Question

10A OF CURRENT PASSING THROUGH A CONDUCTOR IN MIN. FIND NUMBER OF ELECRON CROSSING THROUGH THE CONDUCTOR.

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 in one second.

So in 1 minute num of electrons = 60 × 6.25 × 10^ 18 = 3.75 × 10 ^20