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Two equal charges q of opposite sign are...

Two equal charges `q` of opposite sign are separated by a small distance `2a`,The electric intensity `E` at a point on the perpendicular bisector of theline joining the two charges at a very large distance `r` form the line is

A

`(1)/(4piepsilon_(0))(qa)/(r^(2))`

B

`(1)/(4piepsilon_(0))(2qa)/(r^(3))`

C

`(1)/(4piepsilon_(0))(2qa)/(r^(2))`

D

`(1)/(4piepsilon_(0))(qa)/(r^(3))`

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2
Similar to `B` on equitorial line of a short bar magnet
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