A charge +q is placed at the origin of X...

A charge +q is placed at the origin of X-Y axes as shown in the figure. The work done in taking a charge Q from A to B along the straight line AB is

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

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

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

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

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