Physics

Problem

A cylindrical copper wire of length

2.0\,\text{m}

and radius

0.50\,\text{mm}

has resistivity

1.7\times10^{-8}\,\Omega\!\cdot\!\text{m}

. If a potential difference of

3.0\,\text{V}

is applied between its ends, what is the magnitude of the resulting current? a)

6.9\,\text{A}

69\,\text{A}

0.69\,\text{A}

690\,\text{A}