Question

How many electrons constitute a charge of 1 coulomb?

• A. 7.25 x 10¹⁸
• B. 6.25 x 10¹⁸
• C. 7.25 x 10²⁸
• D. 6.25 x 10²⁸

Answer 1

The correct option is B

6.25 x 10¹⁸

We know the charge on $1$ electron is $1.6\times {10}^{-19}C$.
$Chargeof1C=\frac{1}{1.6\times {10}^{-19}}electrons$
or, $1C=\frac{{10}^{19}}{1.6}$
or, $1C=6.25\times {10}^{18}electrons$