Let a total charge 2Q be distributed in a sphere of radius R, with the charge density given by 
, 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 form the centre. If A and B do not experience any force, then:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
JEE Main 2019
Or 
Or 
Or 
… (i)
Also, 
… (ii)
From above equations,
… (iii)
According to given condition
… (iv)
From equations (iii) and (iv), we have
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