An iron wire has a diameter 1.6 mm and resistivity9.71x 10-8 Qm. What will be the length of this wireto make a resistance of 80Q. What will be the newresistance, if the radius is doubled?(a) Length of the wire (in m) =%3D(b) Resistance of the wire (in )N =

An iron wire has a diameter 1.6 mm and resistivity 9.71x 10-8 Qm. What will be the length of this wire to make a resistance of 80O. 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 =

An iron wire has a diameter 1.6 mm and resistivity 9.71x 10-8 Qm. What will be the length of this wire to make a resistance of 80O. 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 =

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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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

An iron wire has a diameter 1.6 mm and resistivity
9.71x 10-8 Qm. What will be the length of this wire
to make a resistance of 80Q. What will be the new
resistance, if the radius is doubled?
(a) Length of the wire (in m) =
%3D
(b) Resistance of the wire (in )N =

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