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Charge on an electron is 1.6 × 10-19 coulombs. No electron passing through the wire per second on flowing of 1 ampere current through the wire is?

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0.625

\times

10-19

1.6

\times

10-19

1.6

\times

1019

0.625

\times

1019

answer is D.

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Detailed Solution

Concept: Ohm’s law states that the current flowing through a conductor is directly proportional to the voltage drop across the conductor.
Using the formula:
The current is defined as rate of flow of charged particle.i.e.

Hence the charge flown is,

Hence

The charge

is due to electrons, therefore,

Here

is number of electrons passing and e is the electronic charge of value

Then,

Using this information we see that the number of electrons will be 0.625 x 1019 .
Hence, , the correct Option is 4 .

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