Answered: A cylindrical copper rod has resistance…

A cylindrical copper rod has resistance R. It is reformed to twice its original length with no change of volume. Its new resistance is: O R/2 OR O 2R O 4R O 8R

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 12CQ: Explain why R=R0(1 + a?T) for the temperature variation of the resistance R of an object is not as...

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Concept explainers

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.

Question

A cylindrical copper rod has resistance R. It is reformed to twice its original length with no change of volume. Its new resistance is:
O R/2
OR
O 2R
4R
O 8R

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