1.Two wires, A and B, are made from the same material. The length of A is twice the length of B, andthe diameter of A is twice the diameter of B. If the resistance of B is 30 0, what is the resistance ofthe wire A?2.A uniform wire which has a resistance of 50 0 is being stretched until its length is increased by10%. Assumed that the volume of the wire is constant, calculate the final resistance of the wire.

The resistance is given by the formula.R=ρlAWhere, l is length of the conductorA is cross section…

Two wires, A and B, are made from the same material. The length of A is twice the length of B, and the diameter of A is twice the diameter of B. If the resistance of B is 30 N, what is the resistance of 1. the wire A?

Two wires, A and B, are made from the same material. The length of A is twice the length of B, and the diameter of A is twice the diameter of B. If the resistance of B is 30 N, what is the resistance of 1. the wire A?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 12P

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

1.
Two wires, A and B, are made from the same material. The length of A is twice the length of B, and
the diameter of A is twice the diameter of B. If the resistance of B is 30 0, what is the resistance of
the wire A?
2.
A uniform wire which has a resistance of 50 0 is being stretched until its length is increased by
10%. Assumed that the volume of the wire is constant, calculate the final resistance of the wire.

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