Answered: A copper wire has a diameter 0.9 mm and…

A copper wire has a diameter 0.9 mm and resistivity 1.6 x 10-8 Qm. What will be the length of this wire to make a resistance of 150. What will be the new resistance, if the radius is doubled?

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter17: Current And Resistance

Section: Chapter Questions

Problem 10CQ: Power P0 = I0 V0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew =...

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Concept explainers

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.

Question

A copper wire has a diameter 0.9 mm and resistivity 1.6 x 10-8 Qm. What will be the length of this wire to make a resistance of 150.
What will be the new resistance, if the radius is doubled?
(a) Length of the wire (in m) =
(b) Resistance of the wire (in n =

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