Question

When two objects are rubbed with each other, approximately a charge of 50 nC can be produced in each object. Calculate the number of electrons that must be transferred to produce this charge.

Answer 1

Charge produced in each object q = 50 nC
q = 50 x 10^-9 C
Charge of electron (e) = 1.6 x 10^-9 C

Number of electron transferred, n = `"q"/"e" = (50 xx 10^-9)/(1.6 xx 10^-19)`

=31. 25 × 10^-9 × 10¹⁹

n = 31.25 x 10¹⁰ electrons