Examveda

If a copper wire is increased to double its length, its resistance will become

A. Four times

B. One–fourth

C. Double

D. Half

Answer: Option A

Solution (By Examveda Team)

When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times.

This Question Belongs to General Knowledge >> Physics

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