Question

Calculate the number of electons that would flow per second through the cross section of a wire when 1 A current flows in it

Answer 1

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.

Suppose, there are n electrons in 1C charge, then,

ne=1C

n=1/(1.6X10^-19)=6.25X10^18. This number of electrons passes through cross section of a wire carrying 1A current.

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