JEE Main 12 Apr 2019 Paper 2 Solved Paper

Section: Physics

Question : 20 of 90

Marks: +1, -0

Let a total charges 2 Q be distributed in a sphere of radius R, with the charge density given by p(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 not experience any force, then:

[12 Apr 2019 Shift 2]

a=
3R
2
1
4
a=
R
√3
a=2−
1
4
R
a=8−
1
4
R

Validate

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