Physics

Problem

1.5\,\text{m}

long copper wire has a uniform cross-sectional area of

0.10\,\text{mm}^2

. What potential difference must be applied across the wire to establish a current of

10\,\text{A}

? (Resistivity of copper

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

.) a)

25\ \text{V}

0.26\ \text{V}

2.5\ \text{V}

8.5\ \text{V}