Physics

Problem

A metallic wire

2\,\text{m}

long has a resistance of

2\,\Omega

. If its diameter is

1\,\text{mm}

, the resistivity of the material is closest to a)

2.0\times10^{-7}\,\Omega\,\text{m}

7.9\times10^{-7}\,\Omega\,\text{m}

3.1\times10^{-6}\,\Omega\,\text{m}

6.3\times10^{-7}\,\Omega\,\text{m}