In an aluminium strip

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

Problem

In an aluminium strip, the electron number density is

8.5\times10^{28}\,\text{m}^{-3}

. The strip has a cross-sectional area of

1.0\,\text{mm}^2

and the electrons acquire a drift velocity of

2.0\times10^{-4}\,\text{m\,s}^{-1}

. Calculate the current through the strip. (a)

27\,\text{A}

(b)

0.27\,\text{A}

(c)

2.7\,\text{A}

(d)

1.3\,\text{A}

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