Question

If ${10}^9$ electrons move out of a body to another body every second, how much time is require to get a total charge of 1 coulomb on the other body?

Answer 1

1 Coloumb = $6.25\times {10}^{18}$ electrons (q = ne put q = 1 and $e=1.6\times {10}^{-19}$)

Time required = ($6.25\times {10}^{18})/{10}^9$ seconds = $6.25\times {10}^9$ seconds (considering no electron loss in path).