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One coulomb charge is equivalent to the charge contained in :(a) $2.6 \times 10^{19}$ electrons(b) $6.2 \times 10^{19}$ electrons(c) $2.65 \times 10^{18}$ electrons(d) $6.25 \times 10^{18}$ electrons
Charge on each electron is $e$
We can say that total charge $q=n e,$ where $n$ is the number of electrons.
On rearranging, we get $n=\frac{q}{e}$
We know that charge of an electron is $e=1.6 \times 10^{-19} \mathrm{C}$.
Then for $q=1$, substituting the values, we get,
$n=\frac{1}{1.6 \times 10^{-19}}=0.625 \times 10^{19}=6.25 \times 10^{18}$ electrons
The answer is (d) $6 .25 \times 10^{18}$ electrons
Updated on: 10-Oct-2022
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