Two positive charges of magnitude 'q are...

Two positive charges of magnitude 'q` are placed at the ends of a side (side 1) of a square of side '2a'. Two negative charges of the same magnitude are kept at the other corners. Starting from rest, if a charge Q moves from the middle of side 1 to the centre of square, its kinetic energy at the centre of square is

A

`1/(2piepsilon_0)(qQ)/a(1-1/sqrt5)`

B

zero

C

`1/(2piepsilon_0)(qQ)/a(1+1/sqrt5)`

D

`1/(2piepsilon_0)(qQ)/a(1-2/sqrt5)`

Text Solution

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The correct Answer is:

C

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