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Question

The surface charge density of a sphere of radius r, is σ. It is placed at a point A. The electric field intensity at B due to this sphere is E. Another charge sphere of 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
2Eϵo
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B
4Eϵo
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C
Eϵo
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D
3Eϵo
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Solution

The correct option is A 2Eϵo
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