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The surface charge density of sphere of ...

The surface charge density of sphere of radius r is `sigma`. It is placed at a point A. The electric field intensity at B due to this sphere is E. Another charged sphere os radius 2r is placed at B. If the intensity at the centre of A and B is E/2 then the surface charge density of B is

A

`(sigma)/(2)`

B

`-(sigma)/(2)`

C

`(-7sigma)/(32)`

D

`(7sigma)/(32)`

Text Solution

Verified by Experts

The correct Answer is:
D
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