Physics

Problem

A copper wire

2\,\text{m}

long has a resistance of

1.0\,\Omega

. It is drawn out uniformly until its length becomes

3\,\text{m}

, the temperature remaining unchanged. What is its new resistance? a)

3.0\,\Omega

2.25\,\Omega

1.5\,\Omega

4.5\,\Omega