Question

1
. A current of 1.6 mA flows through a conductor. If
charge on an electron is - 1.6 x 10-19 coulomb, find
the number of electrons that will pass each second
through the cross section of that conductor,​

Answer 1

Answer:

A current of 1 ampere is said to flow when 1 coulomb of charge passes a given point in 1 sec.

Charge flowing through a conductor in one second is given as charge=current×time. It is given that the current through the conductor is 1.6 mA, that is, 1.6×10- 3 A

Therefore, charge =1.6×10-3 ×1=1.6×10−3 C.

Number of electrons passing through the conductor in one second is given as q/ e = 1.6 × 10-3 / 1.6 × 10 - 19 = 10^16

Hence, the number of electrons passing through the conductor in 1 second is 10^16.

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