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Electrostatics question

2018 · 15 Apr · Shift 2 · Q45
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Electrostatics question

2018 · 15 Apr · Shift 2 · Q45

JEE MainPhysicsElectrostaticsMCQ+4 / −1
A solid ball of radius R has a charge density ρ\rhoρ given by ρ\rhoρ=ρ\rhoρ o (1 −rR-\frac{r}{R}−Rr​) for 0 ≤\le≤ r ≤\le≤ R. The electric field outside the ball is :
  1. A
    ρoR3∈or2{{{\rho _o}{R^3}} \over {{ \in _o}{r^2}}}∈o​r2ρo​R3​
  2. B
    ρoR312∈or2{{{\rho _o}{R^3}} \over {12{ \in _o}{r^2}}}12∈o​r2ρo​R3​
  3. C
    4ρoR33∈or2{{4{\rho _o}{R^3}} \over {3{ \in _o}{r^2}}}3∈o​r24ρo​R3​
  4. D
    3ρoR34∈or2{{3{\rho _o}{R^3}} \over {4{ \in _o}{r^2}}}4∈o​r23ρo​R3​
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