Question

The number of electrons present in $1C$ of charge is ______.

• A. $4.25\times {10}^{18}$
• B. $6.25\times {10}^{18}$
• C. $3.25\times {10}^{18}$
• D. $2.25\times {10}^{18}$

Answer 1

The correct option is B $6.25\times {10}^{18}$

Charge possessed by one electron is $e=1.6\times {10}^{-19}C$

$Q=1C$

Number of electrons =$N$

$Q=Ne$

$⟹N=\frac{Q}{e}=\frac{1}{1.6\times {10}^{-19}}$

$⟹N=6.25\times {10}^{18}$

Answer-(B)