The length of a certain wire is kept same while its radius is doubled.What is the new resistivity of this wire?
A)It is increased by a factor of 2.
B)It is increased by a factor of 4.
C)It is reduced by a factor of 2.
D)It is reduced by a factor of 4.
E)It does not change.

Question

Quizplus · Accepted Answer

The resistivity of a material depends only on the material's intrinsic properties and does not depend on its shape or size. Therefore, when the radius of the wire is doubled, its resistivity does not change.

The Length of a Certain Wire Is Kept Same While