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A positive point charge q is carried fro...

A positive point charge q is carried from a point B to a point A in the electric field of a point charge +Q at O. If the permittivity of free space is `epsi_0`, the work done in the process is given by (where `a = OA` and `b = OB`) -

A

`(qQ)/(4piepsi_(0))(1/a+1/b)`

B

`(qQ)/(4piepsi_(0))(1/a-1/b)`

C

`(qQ)/(4piepsi_(0))(1/(a^(2))-(1)/(b^(2)))`

D

`(qQ)/(4piepsi_(0))(1/(a^(2)) + 1/(b^(2)))`

Text Solution

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The correct Answer is:
B
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