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A solid sphere made of insulating material has a radius R and has a total charge Q distributed uniformly in its volume. What is the magnitude of the electric field intensity, E, at a distance r (0 < r < R) inside the sphere?
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1 . Qr 4πε0 R3
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3 . Qr 4πε0 R3
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1 . Q 4πε0 r2
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1 . QR 4πε0 r3
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Correct Option: A
By Gauss's theorem
where, Qenc = charge enclosed in radius r
| or E(4πr2) = | ||
| R3 |
| or E = | ||
| 4πε0R3 |
