Question

Find the no. Of electrons 1. 5c of charge 2. 1600c of charge

Answer 1

q = ne

where q is the total charge, n is the no. of electrons and e is the charge of an electron.

1. If q = 1.5 c then n = ?

n = q÷ e

= 1.5 ÷ (1.6 ×10^-19)

Here 1.6 × 10^-19 is the charge of an electron.

= 0.9375 × 10^ 19

or approximately 10^19.

2. q = 1600

n = 1600 ÷ (1.6 × 10^-19)

= 1000 × 10^ 19

= 10^ 22