Question

The charge possessed by an electron is 1.6x10-19coulombs. Find the number of electrons that
will flow per second to constitute a current of 1 ampere.

Answer 1

Given that

Charge (Q) = 1 C

Electron (e) = 1.6× 10^-19

Number of electron (n) = ?

Q= ne

1 C = n × 1.6×10^-19 C

n = 1/(1.6×10^-19)

n = 6.25 × 10^18 electron

Answer 2

answer : 6.25 × 10^18

explanation : Charge on an electron , e = 1.6 × 10^-19C

we have to find number of electrons that will flow per second to constitute a current of 1 Ampere.

we know, charge = current × time,

charge flows through appliance, Q = 1A × 1s = 1 C

we also know, charges are quantised.

mean, Q = ne , where n is number of electrons.

so, 1C = n × 1.6 × 10^-19 C

or, n = 1/1.6 × 10^-19

or, n = 6.25 × 10^18

hence, number of electrons flow per second to constitute a current of 1A.