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The charges on an object is given by Q =...

The charges on an object is given by Q = ne, here n is number of electrons and e is electronic charge `(-1.6 xx 10^(-19) C)`. If an object has charge `-5 xx 10^(-19) C`, what should be number of excess electron on it?

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The correct Answer is:
3
`Here, Q = -5 xx 10^(-19) C, e = - 1.6 xx 10^(-19) C, n = ?`
`:. n = Q/e= (-5 xx 10 ^(-19) C)/(-1.6 xx 10 ^(-19)C)= 3.125=3.`
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