Question

If ${10}^{18}$ electrons are taken out every second from a body, then how much time is required to get a total charge of 0.1 C from it?

• A. 0.625 s
• B. 6.25 s
• C. 62.5 s
• D. 625 s

Answer 1

The correct option is A 0.625 s

$i=\frac{N.e}{1sec}=\frac{q}{t}$

$t=\frac{q}{N_e}$

$t=\frac{0.1}{{10}^{18}\times 1.6\times {10}^{-19}}$

$t=0.625$ seconds