Electrostatics: JEE Main 2019 Physics question

JEE Main 2019 · 12 Apr, Evening shift · Q6981

JEE Main 201912 Apr, Evening shiftPhysicsHardElectrostatics167× since 2002

Let a total charge 2Q be distributed in a sphere of radius R, with the charge density given by

\rho

(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 :

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JEE Main 2019 Electrostatics Question with Solution (12 Apr Evening shift, Q6981) | JEE Arc

JEE Main 2019 · 12 Apr, Evening shift · Q6981

JEE Main 201912 Apr, Evening shiftPhysicsHardElectrostatics167× since 2002

Let a total charge 2Q be distributed in a sphere of radius R, with the charge density given by

\rho

(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 :