Physics

Problem

A copper wire of length

2\,\text{m}

has a resistance of

5\,\Omega

. It is stretched uniformly so that its length becomes

2.5\,\text{m}

, with no change in volume. What is the new resistance of the wire? a)

9.8\,\Omega

7.8\,\Omega

12.5\,\Omega

6.3\,\Omega