Fundamentholfundamenthol
JEE Main2019Physics
Q.

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

  1. A

     

  2. B

  3. C

    R

  4. D

    R

Solution

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