Question

Calculate the number of electrons passing per second through a conductor to produce a current of one ampere.

Answer 1

Current (i) is given by the formula
i = nQ/t

Where
n : Number of charged particles
Q : Charge of the particle (1.6 × 10⁻¹⁹ C for electron)
t : Time

n = it / Q
= 1 A × 1 s / (1.6 × 10⁻¹⁹ C)
= 6.25 × 10¹⁸

∴ 6.25 × 10¹⁸ electrons pass in 1 second.

Answer 2

Answer:

N=it/q

1×1/1.6×10^-19

=6.25×10^18