The length of a certain wire is doubled while its radius is kept constant. What is the change in the resistance of this wire?
A) It stays the same.
B) It is doubled.
C) It is tripled.
D) It is quadrupled.
E) It is reduced by a factor of 2.

Question

Quizplus · Accepted Answer

The resistance of a wire is directly proportional to its length. Doubling the length while keeping the radius (and hence the cross-sectional area) constant will double the resistance.

The Length of a Certain Wire Is Doubled While Its