How many electrons pass through a lamp in one minute if the current be 200 mA?
(Charge on an electron, e = 1.6 × 10–10 C).
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Explanation:
Q = It
= 200 * 10-³ * 60
= 12 As
Q = ne
n = Q/e
= 12/1.6*10^-10
= 0.75*10^10
=7.5*10^9
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