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A solid metallic sphere has a charge +3Q...

A solid metallic sphere has a charge `+3Q`. Concentric with this sphere is a conducting spherical shell having charge `-Q`. The radius of the sphere is `a` and that of the spherical shell is `b(bgta)` What is the electric field at a distance `R(a lt R lt b)` from the centre

A

`1/(4pi epsi_(0)) Q/r`

B

`1/(4piepsi_(0)) (3Q)/r`

C

`1/(4piepsi_(0)) (3Q)/r^(2)`

D

`1/(4pi epsi_(0)) Q/r^(2)`

Text Solution

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The correct Answer is:
C
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