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The line AA' is on a charged infinite co...

The line AA' is on a charged infinite conducting plane which is perpendicular to the plane of the paper. The plane has a surface density of charge sigma and B is a ball of mass m with a like charge of magnitude q, B is connected by a string from a point on the line AA . The tangent of the angle (0) formed between the line AA' and the string is:

A

`(q sigma)/(2 epsilon_(0)mg)`

B

`(q sigma)/(4pi epsilon_(0) mg)`

C

`(q sigma)/(2pi epsilon_(0)mg)`

D

`(q sigma)/(epsilon_(0) mg)`

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