Question

electric current of 200uA flow in a wire for 30 second.calculate a.amount of charge passed through wire.b. number of electrons passed through the wire.​

Answer 1

Explanation:

$electric \: current \:(I) = 200μA= 200 \times {10}^{ - 6}A \\ time(t)= 30 s \\ (a): \: Q=? \\ I= \frac{Q}{t} \\ Q=I \times t \\ = 200 \times {10}^{ - 6} \times 30 \\ = 6 \times {10}^{ - 3} c \\ (b): \: number \: of \: electron \times charge\:on\: electron\\=charge \: given \\ n {e}^{ - } = Q \\ n = \frac{Q}{ {e}^{ - } } \\ = \frac{6 \times {10}^{ - 3}}{1.6 \times {10}^{ - 19} } \\ = \frac{6}{1.6} \times {10}^{ - 3 + 19} \\ = 3.75 \times {10}^{16} \: electrons$

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