How many electrons are passing per second in a circuit in which there is a current of 5 A ?

Explanation

Current `I = 5 A`
time (t) = 1 second
Charge of electron e = `1.6 xx 10^(-19) C`
`I = q/t`
`I = (n e)/t" " :. q = n e`
Number of electron `n = (It)/e`
`= (5 xx 1)/(1.6 xx 10^(-19))`
`n = 3.125 xx 10^(19)`
(ii) (a) When source (S) and listener (L) both are at rest.
(b) when S and L move in such a wa that distance between them remains constant.
When source S and L are moving perpendicular directions.
(d) If the source is situated at the center of the circle along which the listener is moving.