Question

If an electrical appliance, the electric current of $2.4A$ is passed, then the number of electrons passing through it in one second will be :

• A. $0.15\times {10}^9$
• B. $3\times {10}^9$
• C. $1.5\times {10}^{-19}$
• D. $2.4\times {10}^9$

Answer 1

Answer: (C)

$1.5\times {10}^{-19}$

Current is the charge passing through a circuit per second.

Let number of electron passing per second be $n$. Then,

$I=ne$

$n=\frac{I}{e}$

$n=\frac{2.4}{1.6\times {10}^{-19}}$

$n=1.5\times {10}^{19}electrons/second$