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Question

# Charge on an electron is 1.6×10−19 coulomb. Number of electrons passing through the wire per second on flowing of 1 ampere current through the wire will be

A
0.625×1019
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B
1.6×1019
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C
1.6×1019
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D
0.625×1019
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Solution

## The correct option is D 0.625×1019The current is defined as rate of flow of charged particle.i.e.i =QtHence the charge flown is,Q =i tHence Q =1.0×1=1CThe charge Q is due to electrons, therefore,Q =N×eHere Q =1CIf N is number of electrons passing and e is the electronic charge of value 1.6×10−19Then,N =Qe=11.6×10−19=0.625×1019electrons

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