Question

When 10^19 electeon are remived from a neutral metal plane the elecric charge on it is?

Answer 1

Charge on an electron is a constant I. e. -1.6*10^-19C. So if we remove an electron from a substance, we remove a charge of -1.6*10^-19C. Therefore by quantization of charge, the next 4th charge gained on the substance is equal to +1.6*10^-19C.

So if we remove 10^19 electrons, the net charge on the substance is

q=ne

=>q=10^19*1.6*10^-19C

=>q=1.6C

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