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How many electrons pass through a …

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How many electrons pass through a wire in 1 minute if the current passing through the wire is 20 milliampere

Posted by Disha Yadav 5 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 5 months ago

When one coulomb charge passes through any cross section of the wire per second,the current passing is one ampere. Charge of electron ,e=1.6X10^-19C. n=1/(1.6X10^-19)=6.25X10^18. This number of electrons passes through cross section of a wire carrying 1A current.

I= 220 mA =0.22 A

I = Q/T

0.22 = Q/60

Q= 0.22 x 60 = 13.2 C

Where n= number of electrons

E= charge on electrons = 1.6 x 10^-19

13.2 C = n x 1.6 x 10-19

n = 13.2/1.6 x 10-19

n = 8.25 x 1019

0Thank You

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