The number of electrons in one coulomb of electric charge is:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → \( 6.25\times10^{18} \)
Charge is quantised: any charge is a whole number of electron charges, \( Q = ne \), where \( e = 1.6\times10^{-19}\,\mathrm{C} \).
\( \displaystyle n = \frac{Q}{e} = \frac{1\,\mathrm{C}}{1.6\times10^{-19}\,\mathrm{C}} = 6.25\times10^{18} \)