Question

Which law of Physics states that the force between the two electric charges reduces to a quarter of its former value when the distance between them is doubled?

(a) Coulomb's law

(b) Pascal's law

(c) Stefan's law

(d) Hooke's law

Answer 1

(a) Coulomb's law

According to coulomb' s law,

\(F=\frac{1}{4\piε_0}.\frac{q_1q_2}{r^ 2}\)

\(F ∝\frac{1}{r^ 2}\)

Hence, r is doubled, then force between the two electric charges reduces to quarter.