Question

The charge of an electron is known to be $1.6\times {10}^{-19}C$. In a circuit, the current flowing is $1A$. How many electrons will be flowing through the circuit per second?

• A. 1.6 x 10¹⁹
• B. 1.6 x 10^-19
• C. 0.625 x 10¹⁹
• D. 0.625 x 10¹²

Answer 1

The correct option is C

0.625 x 10¹⁹

We know that, current, $I$ = $\frac{Q}{t}$ = $\frac{ne}{t}$

$I$ = $\frac{n\times 1.6\times {10}^{-19}}{1}$

$n=\frac{1}{1.6\times {10}^{-19}}$

Solving we get,

$n$ = $6.25\times {10}^{18}$