Physics

Problem

A solid cylindrical wire is

0.80\,\text{m}

long and has a radius of

0.50\,\text{mm}

. Its measured resistance is

0.040\,\Omega

. Determine the resistivity of the material of the wire. a)

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

1.0\times10^{-8}\,\Omega\,\text{m}

3.9\times10^{-8}\,\Omega\,\text{m}

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