Question

a conducting wire carries 1021 electron in 4minutes . what is the current flowing through the wire ? ​

Answer 1

Answer:

12th

Physics

Current Electricity

Drift Velocity & Mobility

The number of free electron...

PHYSICS

The number of free electrons per 10 mm ordinary copper wire is about 2×10

21

. The average drift speed of the electrons is 0.25 mm current flowing is:

MEDIUM

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ANSWER

Given,

Number of electron, n=2×10

21

Average drift speed, 0.25mm/s

Q=ne

Q=2×10

21

×1.6×10

−19

Q=320C

Since,

s=

T

D

T=

s

D

T=

0.25

10

=40

So, current

I=

T

Q

I=

40

320

I=8A