## Two wires of same length and material but of different radii

two wires of same length and material but of different radii The simplest case is where lenses are placed in contact: if the lenses of focal lengths f 1 and f 2 are " thin ", the combined focal length f of the lenses is given by 13 Two wires A and B are of equal lengths, different cross-sectional areas and made of the same metal. The ratio of their specific resistance will be 1 : 1 Two wires of the same material and same length have same radii r1 and r2 respectively Compare (i) their resistence (ii) Their resistivities - Physics - Electric Circuits resistance and Ohm\s Law Two wires have the same length and the same resistance but are made up of different materials. The resistance of each wire is given by Equation 20. 2. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1. Compare their resistivities. Two metallic wires A and B are connected in series. Two wires have the same length and the same resistance but are made up of different materials. 00 x 10 3 V/m. where. A wire of length 2L is made by joining two wires A and b of same lengths but different radii r and 2r and made of the same material. The diameter of wire A is twice the diameter of wire B. If the number of antinodes in wire A is p and that in B is q then the ratio p: q is : 8. 20 (Q) If wife A has a resistance of R, then wire B has a resistance of 12. Q1d:The resistance in circuit. What is the ratio of the stress developed in the second wire to that developed in the first wire. If the lengths and radii arein the ratio of 4/3 and 2/3, then the ratio of the current passing through the wires will be Two wires A and B made of same material and having their lengths in the ratio 6 : 1 are connected in series. 1 A. 7 ´ 10-5 W·m and the resistivity of aluminum is 2. The circuit shown has a battery and two resistors, with RI > R2. Free PDF Download of CBSE Physics Multiple Choice Questions for Class 12 with Answers Chapter 4 Moving Charges and Magnetism. If the load & radius both are increased to 4 times. Solution: Which wire will be thicker? 4. Answer: Resistance ∴ r 1: r 2 = √2 : 1. (iii) If the resistance of wire A is four times the resistance of wire B, calculate Single Layer – The most common example is a 7 wire strand with a single-wire center and six wires of the same diameter around it. The two voltages are unknown and could be different values. However, wire 1 has cross-sectional area A and wire 2 has cross-sectional area 3A. (b) A view from above of the two wires shown in (a), with one magnetic field line shown for each wire. If resistance of wire A is 34 Ω, then resistance of B will be [RPET 1997] (a) 544 Ω (b) 272 Ω (c) 68 Ω (d) 17 Ω 51. In fact, two nanotubes have the same type if and only if one can be conceptually rotated and translated so as to match the other exactly. The ratio of their resistances 2:26 Two wires of same length and material but different radii are suspended from a rigid support. Greatest 2. When the current ﬂows from the larger-diameter wire into the smaller-diameter wire, A25. 1 Use a shorter wire; Use a wire with a larger diameter . Question 7. Of the following the quantity that is the same for both wires is: Two wires with the same resistance have the same diameter but different lengths. The quantity that is NOT the same for the wires is: A) the end-to-end-potential difference. B) the current. Both are after some circuit above them, also unknown. Two wires are made of the same material and have the same volume. Solution: (i) For wire of radius r 1. The quantity that is NOT the same for the wires is: A) the end-to-end potential difference B) the current C) the current density D) the electric field E) the electron drift velocity Write the letter for the correct answer on the answer sheet. Solution: Question 13: Two resistors having 2Ω and 3Ω resistance are connected—(i) in series, and (ii) in parallel. Of the following the quantity that is the same for both wires is: Question From – Cengage BM Sharma MECHANICS 2 PROPERTIES OF SOLIDS AND FLUIDS JEE Main, JEE Advanced, NEET, KVPY, AIIMS, CBSE, RBSE, UP, MP, BIHAR BOARDQUEST 1 Answer to Two wires of same material and radii r and 2r respectively are welded together end to end. More complex geometries include multiple two-dimensional (2D) bends and three-dimensional (3D) bends. They are joined end-to-end and a potential difference is maintained across the combination. When the currents go opposite ways, the force is repulsive. When they are connected in series across a battery, the heat generated is H 1 When connected in parallel across the same battery, the heat generated during the same time is H 2 Then : (a) H 1 = H 2 (b) H 1 < H 2 (c) H 1 > H 2 (d) H 1 > H 2. Which of the two conductors dissipates the larger amount of power? Explain. The two wires will have (a) the same stress (b) different stress (c) the same strain (d) different strain B must both be ranked first, the ranking would be A:1, B:1, C:3). Two wires of the same length are made, one from each of the materials. 93 Ωm. Example 2 Two wires, both made of brand new copper, did not have the same conductance, even though the wires were of identical length, thickness and at the same temperature. Of the following the quantity that is the same for both wires is: two wires are of the same material but of different length and areas of cross section will their resistivity be same or differentjustify your answer - Physics - TopperLearning. If identical weights are suspended from the ends of these wires, the increase in length is . The free end of B is twisted by an angle . 97 Ù and 1. Household circuits are often wired with two different widths of wires: 12-gauge and 14-gauge. 54-cm-diameter rod of pure silicon that is 20. 5 Ω. a) 1 : 1; b) 2 : 1; c) 1 : 2; d) 1 : 4; Answer: 1 : 1 Question: For a given material, the Young’s modulus is 2. They are joined end-toned and a potential difference is maintained across the combination. 0 cm long, when 1. 0 cm) as shown in . What would be the ratio of heat produced in these wires when same voltage is applied across each? (2) 7. 2. the strain will be the same for both wires D. 0 cm, 3. Compare their resistivities. 2 wires of same length and material but of different radii are suspended from rigid support will stress, strain, extension be same or different - Physics - Mechanical Properties Of Solids Two wires of same length and material but of different radii are suspended from a rigid support. srinidhi21 | 31st Mar, 2015, 06:03: PM the ratio of the lengths of two wires A and B of same materials is 1:2and the ratio of their diameter is 2:1. Their specific resistances. A resistance wire made from German silver has a resistance of 4. Which of the two resistors dissipates the larger amount Resistivity is a function of the material. The resistivities of these materials are 1. Two parallel current-carrying wires will exert forces on one another. What is the ratio of their resistances? 6. Estimate the force on a 10 cm section of wire A. L1 = 0. The total resistance of the wire loop of radius b is R. VARIABLES Table 1. 82 ´ 10-5 W·m. 10 0. 4 times its modulus For two wires of the same material, both the radii and lengths are in the ratio 1:2. The forces required to produce same change in length are in the ratio Question 12: Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances. What could have been different, leading to different measurements, assuming that the same quality equipment was used The force between two parallel wires. Therefore, resultant magnetic field is given by,We have,This is the required of the resultant magnetic field. Q2. They are joined end-to-end and a potential difference is maintained across the combination. If the resistance of wire B is R, the resistance of wire A is Two wires of different materials have resistances in the ratio , lengths in the ratio but have same radii of cross-section. How long should be a wire of the same material but with the radius twice as big, so that the resistance of the wire is also 2 Ω? Determine the resistivity of the material, of which the wire has been made. The ratio v1/v2 is given by The resistance is proportional to the length and inversely proportional to the area (which is proportional to the square of the radius). Five cylindrical wires are made of the same material. Highly conductive materials like silver and copper offer the least amount of resistance to the flow of electrons compared to a highly resistant material like rubber. electric field do current density Two wires of same material and length but diameters in the ratio 1:2 are streached by the same force, the elastic potential energy per unit volume for the two wires then strechted by the same force will be in the ratio Two wires made up of same material are of equal lengths but their radii are in the ratio 1:2. 0 cm) while the other wire is located at (4. 5. 63 x 104 2 Answers to Figure 26-25a gives the magnitude E(x) of the electric fields that have been set up by a battery along a resistive rod of length 9. Since A = r 2. r1 = l/r^2 (r squared). The combination is used as a sonometer wire and kept under tension T. C) Current Density. If rA and rB are the radii of A and B respectively, then rB /rA is Two wires of the same length are made of the same material but have different cross-sectional areas. The spheres are far enough from each other. If the number of antinodes in wire A is p and that in B is q then the ratio p : q is: (A) 1 : 4 (B) 1 : 2 (C) 3 : 5 (D) 4 : 9 9. Two wires made of the same material have the same lengths but different diameters. 7, and Cu = 8. They are attached at one end to two separate immovable walls. com | r3guyw44 Starting early can help you score better! Two wires are made of the same material and have the same length but different radii. One has Figure 2. The ratio of their specific resistance is Resistance = ρ * Length / Area Wire 1 : Length = L Radii = R Area = pie × R² Two wires of same material and radius have their length in ratio of 1:2. Two wires of same length and area made of two materials of resistivity ρ 1 and ρ 2 are connected in series to a source of potential V. If the length and radii of the wires are in the ratio of $\large\frac{4}{3} \: and \:\large\frac{2}{3}$, then the ratio of the currents passing through the wires will be Electrical Resistances of Conductors of Different Lengths Task number: 1788 Two wires made from the same material weigh the same. Being made of the same material means the resistivity is the same for the two wires. 0 cm. D) the electric field. Calculate the resistance of another wire, made from same material, such that its length increases by 4 times and area of cross-section decreases by three times. Find the equivalent resistance in each case. [MP PMT 1990; MP] Two wires of copper are of the same length but’have different diameters. They are joined end-to-end and a potential difference is maintained across the combination. (The schematic Free PDF Download of CBSE Physics Multiple Choice Questions for Class 12 with Answers Chapter 4 Moving Charges and Magnetism. Two wires of the same length and material have different radii. Will in the two wires (a) stress (b) strain and ( c) extension be same or different? 2 conducting wire made up of different material have ratio between their lengths =2:3 and ratio of their area of cross section =2:3 . Two wires of the same length and same material but radii in the ration of 1 : 2 are stretched by unequal forces to produce equal elongation. Both the strings vibrate in their fundamental modes. Will the stress,strain & extension in them be same or different. (a)€€€€ The graph shows the variation of tensile stress with tensile strain for two wires X and Y, having the same dimensions, but made of different materials. Coil B has 40 turns and carries a current of 15 A . Two vibrating strings of the same material but of lengths L and 2L have radii 2r and r respectively. Answer: (b) H 1 < H 2 1. Then, Two cylindrical wires are made of the same material and have the same length. The ratio v1/v2 is given by Two wires of equal lengths are made of the same material. Type AT - Same construction as Type A, except it has a cover designed to assemble with fittings which do not require removal of the cover or any portion of it. Parallel wires carrying currents will exert forces on each other. (m) Area (rn2) 0. Two wires are made of the same material and have the same length but different radii. If the length of A increases by 8 m m, then the increase in length of B is They will be the same, but because they have different lengths and cross sectional areas the resistance will be different. ? Two wires have the same length and the same resistance but are made up of different materials. They are joined end-to-end and a potential difference is maintained across the combination. Theyare joined end-to-end and a potential difference is maintained across the combination. 7 × 10-5Ω·m and the resistivity of aluminum is 2. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1. The formula therefore If two long parallel wires 1 m apart each carry a current of 1 A, then the force per unit length on each wire is 2 x 10 - 7 N/m. Two wires of same length & materials but different radii are suspended from a rigid support. Compare (i) their resistances (ii) their specific resistance. The focal length of a convex lens made of glass is 20 cm. I'm told that the charge is going to flow until both of the conductors gain the same potential (on top/inside of them). 38 mm in diameter. First of all Specific resistance the inherent property of a material… It is defined as “ the resistance offered per unit length and unit cross sectional area of that material when a known quantity of voltage is applied at its end”. asked Sep 23, 2016 in Class X Science by Sourav Prusty Basic ( 33 points) A wire of length 2L, is made by joining two wires A and B of same length but different radii r and 2r and made of the same material. Filler Wire – Two layers of uniform-size wire around a center with the inner layer having half the number of wires as the outer layer. 020 0. Asked by M. If they are pulled by the same force, then increase in length will be in the ratio A rod of length l and radius r is joined to a rod of length l/2 and radius r/2 of same material. Calculate the length of a telegraph wire needed for having a resistance of 10. Two wires A and B of same material and of equal length with the radii in the ratio 1: 2 are subjected to identical loads. 7 × Math. If resistance of one is 3 ohm ,find the other. A resistance wire made from German silver has a resistance of 4. A current ﬂows in the wire combination. (a) The magnetic field produced by a long straight conductor is perpendicular to a parallel conductor, as indicated by RHR-2. s. 4:16 2 wires of same length and material but of different radii are suspended from rigid support will stress, strain, extension be same or different - Physics - Mechanical Properties Of Solids If X is the extension due to w and Young modulus of the material of the wires is Y, then restoring force produced in them are F1 and F2 given as F1=A1X Y/L=k1X Two wires P and Q of same length and material but radii in the ratio 2:1 are suspended from a rigid support. the welded point is mid-way between the two bridges. You can use this wire resistance calculator to estimate conductance too, since: G = σ * A / L. The area of cross section of the upper wire is 0. Third greatest Chapter 26, Concept Question 06 In the figure, a wire that carries a current consists of three sections with different radii. They are joined end-to-end and a potential difference is maintained across the combination. Compare the resistance of two wires. What will be its new Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. Calculate the ratio of radii of the two wires. A. The 12-gauge wire has a diameter of 1/12 inch while the 14-gauge wire has a diameter of 1/14 inch. Wire A is bent into a circle of radius R and wire B is bent to form a square of side ‘a’. Even when the wires have the same length, they may have the same resistance, if the cross Coaxial cable is a type of transmission line, used to carry high-frequency electrical signals with low losses. Wire A has a diameter that is twice as that of wire B. They are joined end-to-end and a potential difference is maintained across the combination. " "The relationship among L i , Δ L , Y , F , and A can be written as "The relationship among L i , Δ L , Y , F , and A can be written as "Two wires, made of the same material but with different cross-sectional geometries, will have If two pieces of wire are made of the same material and have the same length but different resistance, then the one with the greater cross section area has the lower resistance. Two wires are made of the same material and have the same length but different radii. If wire 1 has length L1 and wire 2 has length L2, how do L1 and L2 compare if wire 1 is made from copper and wire 2 is made from aluminum? The resistivity of copper is 1. The one of length L with frequency v1 and the other with frequency v2 . Of the following quantities, which quantity is the same for both wires? A) Potential Difference. 82× 10-5Ω·m. If the length of A increases by 8 m m, then the increase in length of B is There are two wires of the same material. Two wires are made of the same material and have the same length but different radii. Two wires are made of the same material and have the samelength but different radii. Feb 05,2021 - Two wires of the same material and length, but diameters in the ratio 1 : 2 are stretched by the same force. Conductor A has a larger radius than conductor B. 3. Thus if two pairs of wires of the same material and length and of different cross section areas are tested at room temperature, using a circuit consisting of a battery eliminator and ampmeter, the wire with the lesser cross section area will give greater resistance when compared to the wire with larger cross section area. 60 L2 Q7. 010 0. Of thefollowing the quantity that is the same for both wires is: PotentialDifference Current Resistance None of theabove 1) Two wires are made of the same material and have the same length but different radii. 0k points) A wire of length 2L, is made by joining two wires A and B of same length but different radii r and 2r and made of the same material. Theyare joined end-to-end and a potential difference is maintained across the combination. Let's say wire 1 carries a current I 1 out of the page. Third greatest Chapter 26, Concept Question 06 In the figure, a wire that carries a current consists of three sections with different radii. Find the ratio of the total resistance of series combination and the resistance of wire A, if both the wires are of same material Two wires of same material and length have resistances 5Ω and 10Ω respectively. Take wires of the same material, say copper, and the same thickness but of different lengths. The resulting frictional force between the surfaces . ? Two wires have the same length and the same resistance but are made up of different materials. It is used in such applications as telephone trunklines, broadband internet networking cables, high-speed computer data busses, cable television signals, and connecting radio transmitters and receivers to their antennas. If the resistance of wire B is R, the resistance of wire A is____? Two Wires of the Same Material and Same Length Have Radii R1 and R2 Respectively Compare: (I) Their Resistances, (Ii) Their Resistivities. B. Two coaxial solenoids of different radii carry current I in the same direction. When the wires are subjected to the same force, _____. They are stretched under the same tension. Question 8. Both carry the same load. not enough information given to decide [Solution Manual] Mechanics of Material, 7th Edition - James M. An iron box of 400 W power is used daily for 30 minutes. If all wires rank equally, rank each as '1'. 003 cm 2. 11th Two wires of same length and material but of different radii are suspended from rigid support both carry the same load at the lower end. When considering the MMF it makes no difference whether you have twelve turns of wire carrying one amp, or three turns carrying four amps, or two turns with six amps. Two wires of the same length and material have different radii. They are joined end-to-end and a potential difference is maintained across the combination. B) Current. (a) Find the maximum load that can be put on the hanger without Two metallic wires, P 1 and P 2 of the same material and same length but different cross-sectional areas, A 1 and A 2 are joined together and connected to a source of emf. Two wires A and B of same material and same mass have radius 2 r and r. One wire sets up a magnetic field that influences the other wire, and vice versa. potential difference be current C. A weight w is L, 2R suspended from the combination as shown in the figure. A deforming force F is applied to this composite wire which causes a total elongation of 1 cm. One wire is 21 m long and 0. They have the same lengths. Their cross sectional areas A must differ by a factor of 3. I connect them with a conducting wire. The free end of small rod is fixed to a rigid base and the free end of larger rod is given a twist of θ, the twist angle at the joint will be (a) θ / 4 (b) θ / 2 (c) 5 θ / 6 (d) 8 θ / 9 Two wires of same Stack Exchange Network Stack Exchange network consists of 176 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Temperature Length Sectional Wire Material A silver B silver CC) 20. conducting path whereas a potential difference is the consequence of two points in space being at different potentials. A ply, or braid, of suitable material may be used over the inner tube or over the wire reinforcement (or both) to anchor the synthetic rubber to the wire. SAE 100R2 . Of the following the quantity that is the same for both wires is: 8. Of thefollowing the quantity that is the same for both wires is: A. Both carry the same load at the lower end. 0 cm, 0. What current flows through a 2. 9). Wire 2, a distance d to the right of wire 1, carries a current I 2 out of the page. (ii) Name the property which is different for both the wires. Will the stress, strain and extension in them be same or different? Two wires are made of the same material and have the same length but different radii. Wire A has a radius that is double the radius of wire B. the stress will be greater for the thinner wire C. potential differenceB. This experiment will be focusing specifically on that last factor – length – and investigate just how much of a role a length of a wire would have on its electrical resistance by using a range of Wire 1 has radius R, and wire 2 has radius 2R. ρ (l / πr 1 2) : ρ (l Q 4: Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. Greatest 2. C. Bending is a manufacturing process that produces a V-shape, U-shape, or channel shape along a straight axis in ductile materials, most commonly sheet metal. Solution: Force of attraction per unit length on two parallel wires carrying current in same direction. coil A has 30 turns and carries a current of 10 A . The resistance is a function of the length, cross-section and resistivity of the material. Q1. the current decreases. Commonly used equipment include box and pan brakes, brake presses, and other specialized machine presses. A copper and a steel wire of the same diameter are connected end to end. If B A and B B are the values of the magnetic field at the centres of the circle and square respectively, then the ratio B A /B B is: "Two wires, made of the same material but with different initial lengths, will have different Young's moduli. If they are stretched by applying equal forces, the increase in their lengths will be in the ratio [MP PET 1994] Two wires with the same resistance have the same diameter but different lengths. They are connected in parallel to a battery. C) the current density. Two wires made of the same material have the same lengths but different diameters. The ratio of the normal forces required to produce the same change in the lengths of these two wires is. Is the resistivity of all wires same? 4. Two wires A and B of same material and of equal length with the radii in the ratio 1: 2 are subjected to identical loads. The figure shows two thin rods, one made of aluminum [ = 23 × 10 6 (C°) 1] and the other of steel [ = 12 × 10 6 (C°)–1]. Find the twist angle 6 at the junction Two wires are made of the same material and have the same length but different radii. Will the following properties in the two wires be the Two wires of the same material and same length have radii r1 and r2 respectively. asked May 15, 2019 in Physics by Simrank ( 72. The equivalent resistivity for the same area is. D) Electric Field Two wires 'A' and 'B' of the same material have radii in the ratio 2:1 and lengths in the ratio 4:1. This can be an unreliable value as illustrated by tests carried out (by the author) on two pieces of wire rope supplied by the same well-known manufacturer both of which were cut from the same length, varied in tensile capacity by only 1. 7 people answered this MCQ question is the answer among for the mcq Two wires A and B are of the same material. 3: , where r is the resistivity of the wire material, and L and A are, respectively, the length and cross-sectional area of the wire. 1 Introduction A capacitor is a device which stores electric charge. Verify that your earlier measurements are consistent with this equation. Obtain the ratio of the smaller cross-sectional area to the greater cross-sectional area. When the other end of the wire is pulled by a force f its length increases by l. the current increases. On stretching each of ) 2:1 (C) 1:4 (D) 4:1 9. The elastic potential energy stored per unit volume for the two wires when stretched, will be in the ratio ofa)2 : 1b)4 : 1c)8 : 1d)16 : 1Correct answer is option 'D'. The length of the wire is 8 m. D. A wire of length L and radius r has a resistance R. Answer: Power P = 400 W Two long and parallel straight wires A and B carrying currents of 8. They are joined end-to-end and a potential difference is maintained across the combination. The fields from two charges must have the same magnitude Solve for x, we find x=1. Analytically, the focal length is described by the lens maker's equation: 1/f = (n - 1)(1/R 1 + 1/R 2), where R 1 and R 2 are the radii of curvature, f is the focal length, and n is the index of refraction. The wire material is also an important factor to consider, as it can affect the wire length that can be used on a project. The lengths and radii are wire 1: length l,radiusr wire 2: length l=4, radius r=2 wire 3: length l=2, radius r=2 wire 4: length l,radiusr=2 B must both be ranked first, the ranking would be A:1, B:1, C:3). Wire A:Length of the wire = lRadius of the wire = rWire B:Length of the wire = 2lRadius of the wire = 2r Resistance of wire A, RA = ρlA = ρlπr2 andResistance of wire B, RB = ρ2lπ(2r)2 =ρl2πr2 The resistance Rp of the parallel combination is given by, 1Rp = 1RA+1RB = πr2ρl+2πr2ρl =3πr2ρl ⇒ Rp = ρl3πr2 ∴ Ratio of total resistance Two copper wires of different diameter are joined in series in a circuit. Gere y Barry J. Study the effect of diameter of wire on its resistance when its length is kept constant by using different SWG (standard wire gauge) wires available in the market. If the cost per unit is 75 paise, find the weekly expense on using the iron box. Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. Physics MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. 0 A in the same direction are separated by a distance of 4. If the other wire is 0. Second greatest 3. The radius of the wire is 1 mm. They are stretched under the same tension. Sol: We have to apply Hooke’s law to compare the extension in each wire. The are joined end-to-end and apotential difference is maintained across the combination. Two wires are made of the same material and have the same length but different radii. Calculate the resistance of another wire made from the same material such that its length increases by 4 times and area of cross-section decreases by 3 times. Of the following the quantity that is the same for both wires is: " 16. They are stretched by the same force, then the ratio of increase I n length will be Two cylindrical wires are made of the same material and have the same length. Two disks of identical mass but different radii (r and 2r) are spinning on frictionless bearings at the same angular speed ω0, but in opposite directions. The same force, in this case a weight (w), applied to three different guitar strings of identical length produces the three different deformations shown as shaded segments. The vertical scale is set by E s = 4. or, as asked, the capacitance per unit length C/l: C l = 2π o ln h a 1a 2 (d−a 1)(d−a 2) i ≈ 2π o ln a 1 2 d2 = π 0 ln h √ a 1a 2 d i The last two steps are valid when d˛a 1,a 2, and indicate that the capacitance is governed by the ratio of the geometric mean of the two conductors’ radii to their separation. What must be the ratio of their radii, {eq}\frac{r_B}{r_A Two wires have the same length and the same resistance but are made up of different materials. 25 Ω. Two wires A and B of NCERT Question 4 Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. Their lengths are in the ratio 1 :2 and the diameter are in the ratio 2:1. Obtain the ratio of the smaller cross-sectional area to the greater cross-sectional area. Find out the magnitude and direction of the magnetic field due to the element on the Y-axis at a distance 0·5 m from it. Two wires of equal cross-sectional area, one of copper and other of manganin have the same resistance. A wire stretches by a certain amount under a load. Capacitors vary in shape and size, but the basic configuration is two conductors carrying equal but opposite charges (Figure Physics Physics for Scientists and Engineers: Foundations and Connections Two metal wires of the same material—lengths L and 3 L , respectively, and diameters 3 D and D , respectively—are under different tensions that stretch each by the same amount Δ L. Assuming that it has a uniform cross section,what will be its new resistance? Two wires of the same material have lengths in the ratio 1 : 2 and their radii are in the ratio $1:\sqrt{2}$. A 2D tube has the openings on the same plane; a 3D has openings on different planes. Direction of magnetic field is given by, The resultant magnetic field is directed at angle of 45° with either of the fields. R 2 = ρ (l / A 2) R 2 = ρ (l / πr 2 2) ∴ R 1: R 2 will be. The ratio of the normal forces required to produce the same change in the lengths of these two wires is If X is the extension due to w and Young modulus of the material of the wires is Y, then restoring force produced in them are F1 and F2 given as F1=A1X Y/L=k1X A wire of length 2L, is made by joining two wires A and B of same length but different radii r and 2r and made of the same material. Answer: Question 2. Answer/Explanation. the radii must vary as the square root of 3. If the rate of flow of heat in the larger rod is 4 $4\ cal/\sec$, that in the shorter rod in $cal/\sec$ will be [EAMCET 1986] "Two wires are made of the same material and have the same length but different radii. The longer in length and less cross sectional area the higher the resistance…and vice versa. ← Prev Question Next Question → 0 votes 506 views If the capillary rise in A is 6 cm, then the capillary rise in B is 5. Physics MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. (a) (b) (c) 1. As far as the MMF goes it's all just 'twelve ampere-turns'. Q2:Two wires of the same material and same length have radii 1mm and 2mm respectively. 13. The mass m 1 = 10 kg, m 2 = 20 kg and the hanger is light. Each rod has the same length and the same initial temperature. G is the conductance in siemens (S), σ is the conductivity in S / m, L and A keep the same meaning. If they are stretched by applying equal forces, the increase in their lengths will be in the ratio [MP PET 1994] 16. If these were stretched by the same force , the strain produced will be in the - 7039685 Two wires of same material and same lengths have radii in the ratio of 2 : 3, Compare their resistances. The elastic potential energy stored per unit volume for the two wires when stretched, will be in the ratio ofa)2 : 1b)4 : 1c)8 : 1d)16 : 1Correct answer is option 'D'. Two wires with the same resistance have the same diameter but different lengths. Calculating the volume of a tube essentially involves the same formula as a cylinder (volume=pr 2 h), except that in this case the diameter is used rather than the radius, and length is used rather than height. Find the ratio of strain produced in the wires when: (i) both are under same stress (ii) both are loaded by same weight. The mechanical belt drive, using a pulley machine, was first mentioned in the text the Dictionary of Local Expressions by the Han Dynasty philosopher, poet, and politician Yang Xiong (53–18 BC) in 15 BC, used for a quilling machine that wound silk fibers on to bobbins for weavers' shuttles. Q3:A wire of resistance 3 ohm and length 10 cm is stretched to length 30 cm. 00 mm (Fig. Small filler wires, equal to the number in the inner layer, are laid in Coils P and Q each of radius R have a common centre: BP is directed vertically upwards and BQ is directed horizontally. (a) (b) (c) 1. 250. When the current goes the same way in the two wires, the force is attractive. Find the resistance V/I of the first wire and then compare it with that of the others. The elastic L, R potential energy in the system is 3W2L 3W 2 L 5W2L W2L Question: Two wires A and B of same material have radii in the ratio 2 : 1 and lengths in the ratio 4 : 1. the thinner wire will have a greater elastic limit Two wires A and B of the same material and of equal length with the radii in the ratio 1:2 are subjected to identical loads If the length of A incerses by 8mm then the increase in length B is - Physics - Mechanical Properties Of Solids Two wires A and B are of equal length, different cross – sectional areas and made of the same metal (A)Name the property which is same for both the wires (B) Name the property which is different for both the wires (C)if the resistance of the wire A is 4 times the resistance of wire B , Calculate the ratio of the radii of the wires. The ratio of heat produced in series and parallel combinations would be – Two wires have the same length and the same resistance but are made up of different materials. What is the magnetic force per unit length of the first wire on the second and the second wire on the first? History. The ratio of heat produced in series and parallel combination would be? - Get the answer to this question by visiting BYJU S Q&A Forum. Of the following the quantity that is the same for both wires is: Question From – Cengage BM Sharma MECHANICS 2 PROPERTIES OF SOLIDS AND FLUIDS JEE Main, JEE Advanced, NEET, KVPY, AIIMS, CBSE, RBSE, UP, MP, BIHAR BOARDQUEST If the capillary rise in A is 6 cm, then the capillary rise in B is 5. So, two wires of the same material will have the same resistivity but not necessarily the same resistance. Both carry the same load at the lower end. You are given two wires of the same length and of the same material but having different diameters? Which will have higher resistance? 1 1 Answer; The resistance of the wires of the same material is directly proportional to the length and inversely proportional to the area under a given temperature. When stationary waves are set up in the composite wire, the joint is a node. Both the strings vibrate in their fundamental modes. Which one will be longer? 5. Two wires are made of the same material and have the same length but different radii. It is vibrating at a frequency such that the joint of the two wires forms a node. Calculate the magnitude and direction of the force on a 20 cm length of the wire Y. 5 mm is 2 Ω. The electric field at the origin: A) is zero for situation 4 6. Find the ratio of the diameter of aluminum to copper wire, if they have the same resistance per unit length (as they might in household wiring). ) Two wires A and B of the same material and equal length but of radii r and 2r are soldered coaxially. Two wires of equal lengths, one of aluminium and the other of copper have the same resistance. This definition of the Ampère then gives rise to the basic definition of the unit of charge, the Coulomb: A wire carrying a current of 1 A transports past a given point 1 C of charge per second. both carry the same load. Both carry the same load. What should be the ratio of stretching forces on the wires if equal extensions are to be produced in the two? Given: Ratio of radii = r 1 / r 2 = 1/2, Ratio of length = L 1 / L 2 = 1/2, Extension equal l 1 = l 2 hence l 1 / l 2 = 1, Material is same hence ratio An electric current is passed through a circuit containing two wires of the same material, connected in parallel. The first wire is located at (0. The ends of two rods of different materials with their thermal conductivities, radii of cross-sections and lengths all are in the ratio 1 : 2 are maintained at the same temperature difference. If wire B is to have nine times the resistance of wire A. The string on the left is thin nylon, the one in the middle is thicker nylon, and the one on the right is steel. Two wires of the same material have lengths in the ratio 1 : 2 and their radii are in the ratio $1:\sqrt{2}$. The force between two wires. Two wires A and B are of equal lengths,different cross sectional areas and made of same metal. Their resistances and b. A wire of length 2L is made by joining two wires A and b of same lengths but different radii r and 2r and made of the same material. If t Feb 05,2021 - Two wires of the same material and length, but diameters in the ratio 1 : 2 are stretched by the same force. 0 A and 5. It is vibrating at a frequency such that the joint of the two wires forms a node. Resistance (R) of a conductor varies directly as its length (l) and inversely as its cross - sectional area (A) at a given temperature. The diagrams below depict four different charge distributions. Another wire of the same material of length 2L and radius 2r, is pulled by a force 2 f Find the increase in length of this wire. If the diameter of one wire be 0. Two concentric circular coils A and B of radii 10 cm and 6 cm respectively, lie in the same vertical plane containing the north to south direction. Two wires of the same material (Young’s modulus Y) and same length L but radii R and 2R respectively are joined end to end. Thus, 12-gauge wire has a wider cross section than 14-gauge wire. When a micrometer and two wires are used, the micrometer reading is equal to the measured diameter of the groove plus two wire diameters. I 2 R 2 t 2 ⇒ Two wires A and B of the same material and length l and 2l have radius r and 2r respectively. ρ is the resistivity of material in Ω * m, L is the length of wire, A is the cross-sectional area of the wire. It is vibrating at a frequency such that the joint of the two wires forms a node. E) the electron drift velocity Two Wires of Same Material and Same Lengths Have Radii in the Ratio of 2 : 3, Compare Their Resistances. Their radii and length are both in the ratio 1:2. They are joined end-to-end and a potential difference is maintained across the combination. Two wires of the same length and material but different radii r1 and r2 are suspended from a rigid support both carry the same load at the lower end. What is the ratio of their cross-sectional areas? How do their radii compair? Recall our equation R = L / A. Electricity MCQ Question 7. Power factor can often be improved by the use of capacitor of appropriate capacitance in the “Conductors with the same charge are equipotential“ “The radius of A is 4B, and since V=kQ/r you get 4Va=Vb” 6 Two spherical conductors are separated by a large distance. = 2. 38 Ωm and 3. Will the stress, strain and extension in them be same or different? Two wires are made of the same material and have the same length but different radii. where the constant ? is known as the resistivity of the material. 5. 20. They each carry the same positive charge Q. RHR-1 shows that the force between the parallel conductors is attractive when the currents are in the same direction. R 1 = ρ (l / A 1) R 1 = ρ (l / πr 1 2) (ii) For wire of radius r 2. Wire A has length l and radius r, while wire B has length 2l and radius 2r. (i) Name the property which is same for both the wires. If the length of the wire is, let’s say “L’, the other wires should be of length 2L, 3L and so on. Two wires A and B of same material have radii in the ratio 4 : 1 and length on the ratio 2 : 1. The one of length L with frequency v1 and the other with frequency v2 . 09 cm , then determine the diameter of the other. current density 33. 006 cm 2 and that of the lower wire is 0. Two wires of same material and length have the radii of their cross sections as r and 2r, respectively. 00 × 10 3 V is applied to it? (c) Give two advantages of LED over conventional incandescent lamps. € You may be awarded marks for the quality of written communication provided in your answer to the following Figure TMX shows two coils with different numbers of turns but the same magneto-motive force. The circuits are separate from each other above the point of voltages. Compare the stress - 15156114 Two wires of the same length and material but different radii are suspended from a rigid support. The first conductor is n -times longer than the other. Justify your answer. Answer. Wire A has a radius that is double the radius of wire B. The potential difference across the wires are 3V and 2V respectively. Since the length is same here the wire with the smaller area will have larger resistance. r2 = (2l)/(1 Two wires of the same material and same length have same radii r1 and r2 respectively Compare (i) their resistence (ii) Their resistivities - Physics - Electric Circuits resistance and Ohm\s Law Two copper wires A and B of length 30m and 10m have radii 2cm and 1cm respectively. If the number of antinodes in wire A is p and that in B is q then the ratio p : q is: (A) 1 : 4 (B) 1 : 2 (C) 3 : 5 (D) 4 : 9 9. 0k points) jee mains 2019 Two copper wire of length l and 2l have radii r and 2r respectively. Two wires A and B of the same material and having same length, have their cross sectional areas in the ratio 1:6. Get an answer to your question Supose you have two wires of equal length made from same material. Two long parallel straight wires X and Y separated by a distance of 5 cm in air carry currents of 10 A and 5 A respectively in opposite directions. Study the resistivity of wires made up of different materials. A tube, often also referred to as a pipe, is a hollow cylinder that is often used to transfer fluids or gas. 24 cm. Therefore Resistance will be different for both the wires. 18252180 asked May 15, 2019 in Physics by Simrank (72. they will each be lengthened by the same amount B. Compare:a. Instead of the type ( n , m ), the structure of a carbon nanotube can be specified by giving the length of the vector w (that is, the circumference of the nanotube), and the angle α between the directions of The electric field can only vanish between the two positive charges. Since resistance is inversely proportional to cross sectional area and proportional to length resistance Electrical resistance of a wire with a circular cross-section of a diameter of 0. They are joined end-to-end and a potential difference is maintained across the combination. The rod consists of three sections of the same material but with different radii. Of the following the quantity that is the same for both wires is: Select one: 2. 97 Ù. 9 • Wire A and wire B are made of the same material and have the same length. There are two conductors A and B of the same material, having lengths l and 2l; and having radii r an r/2 respectively. Two uniform wires of the same material have the same length. They are joined end to end and a potential difference is maintained across the combination. 5%, but the tensile modulus (and strain at break) varied by 34%. Several pieces of copper wire, all having the same length but different diameters, are kept at room temperature. 20. If the resistance of wire B is R, then what is the resistance of wire A? (Neglect any The depth of the groove, or the diameter of the undercut, may be checked by using outside calipers or by using two wires and an outside micrometer (Figure 7-58). the sense of the current in A is anticlockwise and clockwise in B for an observer looking at (b) A long wire with a small current element of length 1 cm is placed at the origin and carries a current of 10 A along the X-axis. If all wires rank equally, rank each as '1'. Then the The ratio of frequencies of two wires having same length and same tension and made of the same material is 2:3. Of the following, the quantity that is the same for both wires is: A potential difference across each wire B current inside each wire C) current density inside each wire This can be an unreliable value as illustrated by tests carried out (by the author) on two pieces of wire rope supplied by the same well-known manufacturer both of which were cut from the same length, varied in tensile capacity by only 1. Assume the entire circuit uses the same power source. The resistance of the wires of the same material is directly proportional to the length and inversely proportional to the area under a given temperature. Electric Current And Its Effects Class 7 MCQ With Answer: c Explanation: (c) For same length and area of cross Let's say I have two spherical conductors with different radii and different amount of positive charge on them. Of the following the quantity that is the same for both wires is: A) potential difference B) current C) current density D) electric field E) average conduction electron A wire of length L and radius r is clamped rigidly at one end. They are joined end-to-end and a potential difference is maintained across the combination. 12. Goodno Capacitance and Dielectrics 5. Of the following the quantity that is the same for both wires is: potential difference current current density electric field conduction electron drift speed If are resistances of the two wires, <br>. asked Dec 18, 2018 in Class X Science by aditya23 ( -2,138 points) electricity Two wires are made of the same material and have the same length but different radii. The mechanical belt drive, using a pulley machine, was first mentioned in the text the Dictionary of Local Expressions by the Han Dynasty philosopher, poet, and politician Yang Xiong (53–18 BC) in 15 BC, used for a quilling machine that wound silk fibers on to bobbins for weavers' shuttles. The lengths of three wires were 30m, 36 m and 84m. The resistivities of these materials are 3. Temperature of both the rods is increased by the same Two wires of the same material and same length have radii 1 mm and 2 mm respectively. 5%, but the tensile modulus (and strain at break) varied by 34%. science Given two metallic wires connected in parallel. Section-D. It is vibrating at a frequency such that the joint of the two wires forms a node. Second greatest 3. An electric current is passed through a circuit containing two wires of the same material, connected in parallel. The two disks are brought slowly together. Wire 1 has length L and wire 2 has length 2L. (A)(i)Name the property which is same for both the wires (ii)Name the property which is different for both the wire. A two plane bend or compound bend is defined as a compound bend that has a bend in the plan view and a bend in the elevation. 0 mA. Which of the two wires is lighter? Hence explain why aluminium wires are preferred for overhead POWer = 1. A nichrome wire of length l and area of cross-section a/ 4 has a resistance R. If wire B is to have 9 times the resistance of wire A what must be the ratio of their radii? 1. The conductors are made of the same material but have different radii r. The materials fracture at the points FX and FY respectively. they are connected in 1)-series 2)-parallel. History. the current stays the same. Find the strecth caused in the wire. The "Two wires, made of the same material but with different initial lengths, will have different Young's moduli. Of the following the quantity that is the same for both wires is: Two wires are made of the same material and have the same length but different radii. The ratio of heat produced in series and parallel combinations would be – Ans: ((c) Heat produced in the circuit is inversely proportional to the resistance R. Calculating Forces on Wires Two wires, both carrying current out of the page, have a current of magnitude 5. how is it possible for the wires to have different resistances Two conducting wires of the same material are to have the same resistance. Two wires are made of the same material and have the different radii. 72 x 104 Q m, relative density of Al = 2. The ratio of heat produced in series and parallel combinations would be - (a) 1 : 2 (b) 2 : 1 (c) 1 The two wires shown in figure are made of the Figure same material which has a breaking stress of 8 × 10 8 N m −2. Up until now, I thought the connection of those two schematics is exactly the same thing, just different A compound lens is a collection of simple lenses of different shapes and made of materials of different refractive indices, arranged one after the other with a common axis. Since the length is same here the wire with the smaller area will have larger resistance. Two concentric circular loops of radii b and 2b, made of the same type of wire, lie in the plane of the page, as shown above. Let vecF1 be the magnetic force on the inner solenoid due to the outer one and vecF2 be the magnetic force on the outer solenoid due to the inner one. Two wires of the same material and same length have radii r1 and r2 respectively compare i)their resistancesii)their resistivities - Physics - Electric Circuits resistance and Ohm\s Law Two conductors of equal lengths are connected to a battery by ideal wires. The Two vibrating strings of the same material but of lengths L and 2L have radii 2r and r respectively. " "The relationship among L i , Δ L , Y , F , and A can be written as "The relationship among L i , Δ L , Y , F , and A can be written as "Two wires, made of the same material but with different cross-sectional geometries, will have Two conducting wires of the same material and of equal lengths and equal diametersare first connected in series and then parallel in a circuit across the sam Physics Two metallic wires of the same material have the same length but cross-sectinal area is in the ratio of 1:2. 26-25b). Of the following the quantity that is the same for both wires is: Two wires of same length and material but of different radii are suspended from a rigid support. The resistance of a wire varies according to the four factors of the wire; are temperature, material, diameter/thickness, and length of the wire. Two wires of the same material and same length have radii r1 and r2 respectively compare: (i) their resistances, (ii) their resistivities. What is the resistance of the wire loop of radius 2b? (A) R/4 (B) R/2 (C ) 2R (D) 4R 17. They are connected in parallel to a battery. Thus if we are just comparing the two (so the constants will cancel out). 29 mm in diameter, how long should it be? 16. currentC. The charged particles are all the same distance from the origin. Find the ratio of the drift velocities of free electrons in the two wires when they are connected (i) in series, and (ii) in parallel. Of thefollowing the quantity that is the same for both wires is: potential difference -- J/C Two wires are made of the same material and have the same length but different radii. Two identical wires A and B, each of length ‘l’, carry the same current I. two wires of same length and material but of different radii

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