Question

A 10 C charge flow through a wire in 5 minutes.The radius of the wire is 1mm.It contains 5*10²² electrons per centimetre³ . Calculate the current and drift velocity.
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Answer 1

Explanation:

$r= 1 \times {10}^{ - 3 } \\ n = 5 \times {10}^{22} \times {10}^{6} \\ i = \frac{10}{5 \times 60} \\ i = \frac{2}{60} \\ i = \frac{1}{3} \times {10}^{ - 1} = 0.033a \\ i = neav_{ d} \\ = \frac{0.033}{5 \times {10}^{28} } \times 1.6 \times {10}^{ - 19} \times 11 \times {10}^{ - 6} \\ iv_{d} = 1.326 \times {10}^{ - 6} m \: s$

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