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InterviewSolution
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A current of 100mA. flows through a wire. The charge on an electron is 1.6 × 10-19C. Find the number of electrons passing per second through the cross-section of the conductor. |
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Answer» Given: I = 100mA = 100 × 10-3 A = 0.1A, e = 1.6 × 10-19C Let n electrons are passing per second. charge on one electron = e Total charge passed in one second = ne Thus, i = ne or n = i/e = 0.1/(1.6 x 10-19) = 6.25 x 1017. |
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