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A thick shell with inner radius R and ou...

A thick shell with inner radius R and outer radius 3R has a uniform volume charge density `sigma` `C//m^3`. It has a spherical cavity of radius R as shown in the figure. The electric field at the centre of the cavity is

A

zero

B

`2sigmaR//epsilon_0`

C

`3sigmaR//4epsilon_0`

D

`7sigmaR//12epsilon_0`

Text Solution

Verified by Experts

The correct Answer is:
D
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