Question

According to Coulomb’s Law force between two charges is k*q1*\(\frac {q_2}{r^2}\). What will happen if one of the charges is zero?

(a) No attraction or repulsion

(b) Always attraction

(c) Always repulsion

(d) Cannot predict the nature of the force

I got this question in an interview for job.

I want to ask this question from Coulomb’s Law topic in division Charges and Fields of Physics – Class 12

Answer 1

Right answer is (b) Always attraction

The best I can explain: Though it seems from the formula that the force must be zero, an opposite charge is induced on the uncharged body and then the two opposite charges will attract each other. This also proves that induction occurs before attraction.