Physics

Problem

An aluminium wire of cross-sectional area

0.50\,\text{mm}^2

carries a drift velocity of

2.5 \times 10^{-4}\,\text{m s}^{-1}

. If the number density of free electrons in aluminium is

6.0 \times 10^{28}\,\text{m}^{-3}

, find the current through the wire. a)

2.4\,\text{A}

0.60\,\text{A}

1.2\,\text{A}

3.6\,\text{A}