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Electrons, each with a charge e, move with speed v along a metal wire. The electric current in the wire is I. Plane P is perpendicular to the wire. How many electrons pass through plane P in each second? The answer is I/e I don’t know why no drift velocity in the answer. Thanks

Electrons, each with a charge e, move with speed v along a metal wire. The electric current in the wire is I.
Plane P is perpendicular to the wire. How many electrons pass through plane P in each second? 
The answer is I/e
I don’t know why no drift velocity in the answer.
Thanks

Grade:12th pass

1 Answers

Ayush
13 Points
3 years ago
By the defi nation of current current is equal to total charge flowing per unit cross section per unit time and by quantisation of charge charge q is equal to n*e where n is no of electrons and e is charge on each electron put it in the above farmula you will get by e the answere 

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