A wire of resistance 4 2 is stretched to twice its original length. In the process of stretching, its area of cross-section gets halved. Now, the resistance of the wire is (a) 8 요 (b) 16 N (c) 1 N (d) 4 N

A wire of resistance 4 2 is stretched to twice its original length. In the process of stretching, its area of cross-section gets halved. Now, the resistance of the wire is (a) 8 요 (b) 16 N (c) 1 N (d) 4 N

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 49P: A copper wire has a resistance of 0.500 at 20.0°C and an iron wire has a resistance of 0.525 at the...

See similar textbooks

Related questions

Q: Three wires of cross sectional area 3mm2, 4mm2 and 5mm? are made up of the same material and have…

A: 5mm2 area of cross section wire.

Q: What is the resistance (in N) of a 4.5 m length of copper wire 1.5 mm in diameter? p=1.68x10 2-m…

A: The resistance , R of conductor having length , l resistivity , P and area of cross section ,A is…

Q: In the circuit shown below, R1 = 3 ohms, R2 = 2 ohms, R3 = 5 ohms, 1 = 4 V, 2 = 10 V₁ and 23 = 6 V.…

A: Value of R1 = 3 ohm , R2 = 2 ohm and R3 = 5 ohm Value of E1 = 4 V , E2 = 10 V , E3 = 6 V

Q: What is the internal resistance of the battery in the circuit? 0.6 A (A) (A) 9.40 Ω (B) 12.500…

A: Given: from the given circuit diagram. The total current in the circuit is 0.6 A. The emf of the…

Q: What is the resistance of a wire made of a -8 material with a resistivity of 32x10 Q.m if its length…

Q: The length per unit resistance of copper wire has a value of 7.63 mm per ohm for a diameter of 1,450…

A: Given that length of the copper wire is 7.63mm and diameter of the copper wire is 1.450mm and…

Q: Find the total resistance of this circuit? R6 100 0 R7 100 Q R1 1000 R2 100 2 R3 100 Q R4 R5 100 Q…

Q: Find the equivalent resistance between points A and B in the drawing (R1 = 3.00 N, R2 = 4.00 n).…

Q: The copper wires have the same cross - sectional area but different lengths. Wire Y is twice as long…

A: Given value--- same cross - sectional area . Wire Y is twice as long as wire X. We have to find---…

Q: In the circuit below, R1 = 202, R2 = 10 E, R3 = 10E, R4 = 202. Determine the equivalent resistance…

Q: Three wires of lengths 3m, 4m and 5m are made up of the same material and have the same area of…

A: The expression for the resistance of the wire is R=ρlA Here ρis the resistivity of the material,…

Q: Three wires of cross sectional area 3mm?, 4mm? and 5mm? are made up of the same material and have…

A: The mathematical equation for calculating resistance is : R=ρLA Here, R is the resistance of the…

Q: What is the equivalent resistance (in ohms) between points a and b? 3.0 2 2.0 Ω. 9.0 2 6.0 2 a d…

Q: What is the resistance (in units of N) of a wire made of a material with a resistivity of 3.2 × 10-8…

Q: 1.00 2, 1.00 N 13V 1.00 Q 1.00 2 1.00 2 Find the equivalent resistance of the circuit shown in the…

A: Given: A wheatstone bridge

Q: What is the resistance (in N) of a 4.5 m length of copper wire 1.5 mm in diameter? p=1.68x102-m…

Q: circuit shown below left, find the magnitude and the direction of the current through each resistor…

Q: Three wires of cross sectional area 3mm?, 4mm2 and 5mm? are made up of the same material and have…

Q: Two conductors are made of the same material and have the same length. Conductor 1 is a solid wire…

Q: The truss shown is subjected to forces P = 27 kN, the length L = 18 m divided into equal spaces. If…

A: Draw the free-body diagram of the truss and also draw the right-section of this truss.

Q: What is the resistance (in N) of a 4.5 m length of copper wire 1.5 mm in diameter? p=1.68x10 N-m…

A: given, length of wire l = 4.5 m (meter) diameter of wire = 1.5 mm = 1.5 x 10-3 m radius of wire =…

Q: An electrical circuit consists of R1=12ohm, R2=12ohm, R3=3 ohm and R4=6ohm resistors as follows.…

Q: Two metallic wires made from copper have same length but the radius of wire 1 is half of that of…

A: Radius of wire 1 is half the radius of wire 2 Let the radius of wire 1 be 'r', then the radius of…

Q: A ribbon of nichrome (resistivity of (0.25 mm x 1.00 mm) will be used as a heating element in a…

Q: A power plant is being built that will deliver 870 kW at 16,000 V using a platinum cable with a…

Q: Two conductors are made of the same material. Length of conductor 1 is triple that of length of…

A: Determine the resistance of conductor 1.

Q: Assume the wires below are made of the same material and have the same cross section. Which wire…

A: Given information :- Here we are given four same materials whose area of cross-section is same but…

Q: A metal wire resistance of r is cut into 3 equal parts and then placed together side by side to form…

A: Given: The resistance of the initial length wire is R. The length of each segment is equal.…

Q: Find the cross-sectional area of the copper wire that has a resistance of 2.15 mQ and 250 m long…

Q: The resistance of a 15 cm length aluminum cylinder is 2.5 x 10-5 0. If the resistivity of aluminum p…

A: Resistance of a wire depends upon its cross sectional area, length, and resistivity of vire's…

Q: An aluminum wire has a diameter of 2.59 mm. How many meters of this wire is needed to give a…

Q: Three wires of cross sectional area 3mm2, 4mm2 and 5mm2 are made up of the same material and have…

A: Given data: The areas are, A1=3mm2 A2=4mm2 A3=5mm2

Q: Three wires of cross sectional area 3mm2, 4mm2 and 5mm2 are made up of the same material and have…

Q: 6. The resistance of wire A is 12 Q. Wire B, made of the same material as wire A, is twice as long…

Q: Find the equivalent resistance between points A and B in the drawing (R1 = 5.00 2, R2 = 7.00 N). %3D…

A: We know that we have given a circuit that consists of the parallel and series connection of the…

Q: Find the current flowing through resistor R3 in the circuit shown in the figure (E1 = 5 V, E2 = 10…

A: GivenR1 = 4Ω R3 = 1ΩR2 = 2Ω ∈1 = 5V ∈2 = 10V

Q: The resistance of a coil of copper wire is 3.35 S at 0°C. What is its resistance at 50°C. For copper…

Q: three resistors of resistance 6.00 omega, 8.00 omega, and 12.00 omega, ae connected in parallel. the…

A: When two or more resistances are connected in parallel, the equivalent of the combination can be…

Q: A cylindrical copper rod of length L and cross-sectional area A is reformed to three times its…

A: Length of rod = L Original cross sectional area = A Original resistance = R Let original volume of…

Q: What is the resistance (in units of 0) of a wire made of a material with a resistivity of 3.2 × 10-8…

A: Given: Resistivity of the material ρ =3.2 × 10-8 Ω.mLength of the wire l=65.2…

Q: A copper wire of 10 Q and length L. At what point along its length must the wire be cut out so that…

A: Given: Resistance of copper wire, R = 10 Ohms Length of the wire = L After cutting Resistor of wire…

Q: Two copper wires have the same volume, but wire 2 is 25 % longer than wire 1. The ratio of the…

A: The resistance of the first wire is, R1=ρL1A1=ρLπr12 The length of the second wire is,…

Q: What is the resistance (in units of 0) of a wire made of a material with a resistivity of 3.2 x 10-8…

Q: What is the resistance of a 10.0-meter-long copper wire having a cross-sectional area of 1.50 x 10 6…

A: Given data: A copper wire Length (L) = 10.0 m Cross sectional area (A) = 1.50×10-6 m2 Temperature…

Q: Find the equivalent resistance between points A and B in the drawing. 4.0 2 ww 3.0 2 20.0 2 9.0 2…

Q: Three wires of lengths 3m, 4m and 5m are made up of the same material and have the same area of…

A: As seen from above, resistance is directly proportional to length of wire. Hence a long wire has…

Question

please explain Briefly and in understandable language

- A wire of resistance 42 is stretched to
twice its original length. In the process of
stretching, its area of cross-section gets
halved. Now, the resistance of the wire is
(a) 8 Q
(b) 16 N
(c) 1 2
(d) 4 N

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Formula Used

VIEW

Solution

VIEW

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

Use the atomic theory of matter to explain why the resistance of a material should increase as its temperature increases.
Power P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P0 and (b) Vnew/V0? If, instead, the resistance is held constant while Pnew = 2P0, what are the ratios (c) Vnew/V0, and (d) Inew/I0?
Review. Ail aluminum rod has a resistance of 1.23 at 20.0C. Calculate the resistance of the rod at 120C by accounting for the changes in both the resistivity and the dimensions of the rod. The coefficient of linear expansion for aluminum is 2.40 10-6 (C)-1
When a straight wire is heated, its resistance changes according to the equation R = R0 [1 + (T T0)] (Eq. 17.7), where is the temperature coefficient of resistivity. (a) Show that a more precise result, which includes the length and area of a wire change when it is heated, is R=R0[1+(TT0)][1+(TT0)][1+2(TT0)] where is the coefficient of linear expansion. (See Topic 10.) (b) Compare the two results for a 2.00-m-long copper wire of radius 0.100 mm, starting at 20.0C and heated to 100.0C.
A copper wire has a resistance of 0.500 at 20.0°C and an iron wire has a resistance of 0.525 at the same temperature. At what temperature are their resistances equal?