Question

Calculate how many electrons may be removed from a body so that it may have a charge of $+1$ coulomb

• A. $6.25\times {10}^{18}$ electrons
• B. $6.25\times {10}^{-18}$ electrons
• C. $6\times {10}^{18}$ electrons
• D. $6\times {10}^{-18}$ electrons

Answer 1

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

Using $Q=ne$

where Q = charge

n = number of electrons

e = charge on one electron

So, $n=\frac{Q}{e}=\frac{1C}{1.6\times {10}^{-19}}$

$=0.625\times {10}^{19}$

$=6.25\times {10}^{18}$ electrons.