A straight nichrome wire has resistivity

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

A straight nichrome wire has resistivity

1.1\times10^{-6}\,\Omega\!\cdot\!\text{m}

, length

2.0\,\text{m}

, and diameter

1.0\,\text{mm}

. The wire is connected across a

9.0\,\text{V}

battery. What is the magnitude of the current through the wire? (a)

1.6\ \text{A}

(b)

5.0\ \text{A}

(c)

3.2\ \text{A}

(d)

0.32\ \text{A}

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