Q. Two concentric conducting thin spherical shells $A$ and $B$ having radii $r_{A}$ and $r_{B}$ are charged to $Q_{A}$ and $- Q_{B}$ such that $∣ Q_{B} ∣ > ∣ Q_{A} ∣, r_{B} > r_{A}$ . The graph of electric field versus distance along a line passing through centre is

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Solution:

Q. Two concentric conducting thin spherical shells A and B having radii rA​ and rB​ are charged to QA​ and −QB​ such that ∣QB​∣>∣QA​∣,rB​>rA​. The graph of electric field versus distance along a line passing through centre is