Question

when 10 power 20 electrons are removed from a neutral metal plate through some process, the charge on it becomes?

Answer 1

= I hope it can help you

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

=>Therefore answer will be (be)1.6c