Question

If n electrons pass through the cross-section of a conductor in time t, the current in conductor I =
(a) net
(b) et/n
(c) ne/t
(c) nt/e

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Answer

(c) ne\over t

Reason — If n electrons pass through the cross-section of a conductor in time t, then total charge passes (Q) = n × e and the current in conductor (I) =Q\over t = ne\over t

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