Q50 / 55 · NEST (NISER) 2012 · Physics

A uniformly charged sphere, of total charge $Q$, is expanding uniformly about its center. The magnitude of the electric field $E$ at a point $r$ from the center of the sphere as a function of radius of the sphere varies as,

A
B
Correct answer
C
D

Hence, the correct answer is option: 'C'.

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