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

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

A

zero

B

`((-qQ 1)/(4 pi epsilon_(0) a^(2))) sqrt(2)`a

C

`((qQ 1)/(4 pi epsilon_(0) a^(2))) .(a)/(sqrt(2))`

D

`((qQ 1)/(4 pi epsilon_(0) a^(2))) sqrt(2)`a

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-ELECTROSTATIC POTENTIAL AND CAPACITANCE -ASSIGNMENT SECTION - C
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