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How many electrons flow through the filament of 220 V and 100 W electric lamp per second. Given, electronic charge ` = 1.6 xx 10^(-19)C`.

Text Solution

Verified by Experts

Here, V = 220 V, P = 100 W, t = 1 s
`I = P/V = 100/220 = 5/11 A`
But `I = q/t = (n e)/t or n = It/e = ((5 //11)xx1)/(1.6 xx 10^(-19))`
`= 2.84 xx 10^(18)`
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