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Questions  

If an insulated non-conducting sphere of radius R has charge density ρ. The electric field at a distance r from the centre of sphere (r<R) will be 

a
ρ R3ε0
b
ρ rε0
c
ρ r3ε0
d
3ρ Rε0

detailed solution

Correct option is C

For non-conducting sphere Ein=k.QrR3=ρr3ε0

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