Question

Which among the following cannot be the charge of a charged body?

(a) 4.8*10^-14 Coulomb

(b) 6.4*10^-15 Coulomb

(c) 5*10^-14 Coulomb

(d) 3.2*10^-10 Coulomb

I got this question during a job interview.

Asked question is from Electric Charges in division Charges and Fields of Physics – Class 12

Answer 1

Correct answer is (c) 5*10^-14 Coulomb

For explanation I would say: Charge of a body must be an integral multiple of charge of an electron.  5*10^-14 is not an integral multiple of (1.602*10^-19 Coulomb) which is equal to the charge of an electron. But we can see that 4.8, 6.4, 3.2 are integral multiples of 1.6.