A long copper wire has a uniform cross-sectional area of

PHYSICS · Single correct · CBSE · Physics · Current Electricity · Current Electricity

Problem

A

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}

(b)

0.26\ \text{V}

(c)

2.5\ \text{V}

(d)

8.5\ \text{V}

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