Let a total charge 2Q be distributed in a sphere of radius R, with the charge density given by ρ(r) = kr,...

Question

Let a total charge 2Q be distributed in a sphere of radius R, with the charge density given by ρ(r) = kr, where r is the distance from the centre. Two charges A and B, of −Q each, are placed on diametrically opposite points, at equal distance, a from the centre. If A and B do not experience any force, then:

Accepted Answer

(A)

JEE Main 2019 Physics question

Solution