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A point charge of 5C is placed at point ...

A point charge of 5C is placed at point P (as shown in figure). A unit positive charge is taken from A to B along the circular path shown, then the net work done by electrostatic force is : [O is the centre of the circular path] [Where `k=9xx10^9 Nm^2//C^2`]

A

`+400 K`

B

`+4K`

C

`-400 K`

D

`-4K`

Text Solution

Verified by Experts

The correct Answer is:
C
Work done by electric forces `=k 5(1/.05-1/.01) =-400 K`
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