A solid metal wire has a certain resistance.It is heated and carefully stretched to form a longer,thinner wire.After it cools,the resistance is _______ than it was before.
A)greater
B)less
C)no more
D)lighter

Question

Quizplus · Accepted Answer

When a solid metal wire is heated and carefully stretched to form a longer, thinner wire, the cross-sectional area of the wire decreases, which leads to an increase in its resistance. Therefore, after cooling, the resistance of the wire will be greater than it was before.

A Solid Metal Wire Has a Certain Resistance