Question

How many electrons pass through a lamp in one minute, if the current is 300 m A?

Answer 1

Here, `I= 300 mA = 300 xx 10^(-3)A` ,
`t=60 s, n=?`
`I= ("ne")/(t)` or `n= (It)/(e) = ((300 xx 10^(-3))xx60)/(1.6 xx 10^(-19))`
`1.125 xx 10^(20)`