Question

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

Answer 1

Given,

${10}^9$ electron takes $1sec$

So, $1$ electron takes $\to \frac{1}{{10}^9}sec$

And we know, $1C=6.242\times {10}^{18}electron$

$\therefore 6.242\times {10}^{18}electrons$ takes $\to \frac{6.242\times {10}^{18}}{{10}^9}$

$=6.242\times {10}^{9}sec$

$=\frac{6.242\times {10}^9}{60\times 60\times 24\times 365}years$

$=197.93years$

$\simeq 198years$

If ${10}^9$ electrons move out of a body to another body every second, then $198years$ is required to get a total charge of $1C$ on the other body.