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An insulated sphere of radius R has a uniform volume charge densityρ . The electric field at a point P inside the sphere at a distance r from the center is

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a

Rρ3ε0

b

rρ3ε0

c

Zero

d

23(rρε0)

answer is B.

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Detailed Solution

E=kQrR3=14πε0(4/3)πR3ρrR3= rρ3ε0

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