Which of the following charges is possible?
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(C) According to the quantization of electric charge,the total charge $q$ on a body is given by $q = ne$,where $n$ is an integer $(n = 0, \pm 1, \pm 2

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Both $b$ and $d$

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(C) According to the quantization of electric charge,the total charge $q$ on a body is given by $q = ne$,where $n$ is an integer $(n = 0, \pm 1, \pm 2, \dots)$ and $e = 1.6 	imes 10^{-19} \ C$.
For a charge to be possible,$n = q/e$ must be an integer.
$(a)$ $n = (3.2 	imes 10^{-20}) / (1.6 	imes 10^{-19}) = 0.2$ (Not an integer)
$(b)$ $n = (3.2 	imes 10^{-18}) / (1.6 	imes 10^{-19}) = 20$ (Integer)
$(c)$ $n = (3 	imes 10^{-19}) / (1.6 	imes 10^{-19}) = 1.875$ (Not an integer)
$(d)$ $n = (6 	imes 10^{-17}) / (1.6 	imes 10^{-19}) = 375$ (Integer)
Therefore,charges in options $b$ and $d$ are possible.

Which of the following charges is possible?
$(a)\ 3.2 \times 10^{-20} C$ $(b)\ 3.2 \times 10^{-18} C$
$(c)\ 3 \times 10^{-19} C$ $(d)\ 6 \times 10^{-17} C$

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Which of the following charges is possible? $(a)\ 3.2 \times 10^{-20} C$ $(b)\ 3.2 \times 10^{-18} C$ $(c)\ 3 \times 10^{-19} C$ $(d)\ 6 \times 10^{-17} C$