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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 epsilon_(0))(Q)/( r )`

B

`(1)/(4pi epsilon_(0))(3Q)/( r )`

C

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

D

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

Text Solution

Verified by Experts

The correct Answer is:
C
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