Question

calculate the number of electrons constituting 0.1 coulomb of charge

Answer 1

Charge of one electron=1.6 x 10⁻¹⁹ C
If charge is 1 coulomb then number of electrons= 1/1.6 x10⁻¹⁹
=10¹⁹/1.6
=6.25 x 10¹⁸

Thus 6.25 x 10¹⁸ electrons are present in 1 coulomb of charge.

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