When a uniform metallic wire is stretched uniformly at constant temperature so that…
PHYSICS · Single correct · A Level · Physics · Electricity · Electricity
Problem
When a uniform metallic wire is stretched uniformly at constant temperature so that its volume does not change, which of the following correctly describes the way its resistance varies with its new length L?
(a) Directly proportional to L
(b) Independent of L
(c) Directly proportional to L2
(d) Inversely proportional to L2