Question

calculate the number of electrons that flow per second to constitute a current of one ampere charge on one electron is 1.6×10-19c

Answer 1

When 1 Coulomb charge flow through a wire in 1 second then the current through the wire is 1 AMPERE.

I=Q/t

1 Ampere = 1 Coulomb /1 Second
Charge on 1 electron = 1.6 x 10^-19 Coulomb
By unitary method,

If 1.6 x 10^-19 Coulomb / Second (Ampere) = Current by 1 electron
then, 1( Coulomb / Second) or (Ampere) = 1 / (1.6 x 10^-19) electrons
i.e, 6.25 x 10^18 electrons.

Answer 2

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