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Q.

The electric field due to a uniformly charged non-conducting sphere of radius R as a function of the distance from its centre is represented graphically by

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a

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b

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c

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d

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answer is B.

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Detailed Solution

In Case of non-conducting sphere,

up to surface of sphere (r < R): E∝r       ∵ Er≤R=kQR3r

outside surface of sphere (r > R): E∝1r2   ∵ Er≥R=kQr2

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