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JEE Main 10 April 2016 Paper

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Question : 12

Total: 90

Within a spherical charge distribution of charge density ρ(r),N equipotential surfaces of potential

V0,V0+∆V,∆V0+2∆V,.....V0+N∆V(∆V>0)

, are drawn and have increasing radii r0,r1,r2....rN, respectively. If the difference in the radii of the surfaces is constant for all values of V0 and ∆V then :

ρ(r)αr
ρ(r)=constant
ρ(r)α
1
r
ρ(r)α
1
r2

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