A conductor carries a current of `0.2` A. (a) Find the amount of charge that will pass through the cross section of conductor in `30 s`. (b) How many electrons will flow in this time interval if charge on one electron is `1.6xx 10^(-19)C`?
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Given : `I = 0.2 A, t = 30 s` (a) `"Charge" = "Current" xx "time"` or `Q = Ixx t = 0.2 xx 30 = 6 C` (b) If `n` electrons flow and `e` is the charge on one electron, then total charge passed `Q = ne` `:. n = (Q)/(e) = (6)/(1.6 xx 10^(-19)) = 3.75 xx 10^(19)`
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