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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 . Staring from rest , `n` 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/(4 pi in_0) (2qQ)/a ( 1 + 1/(sqrt5))`

B

`1/(4 pi in_0) (2qQ)/a ( 1 + 1/(sqrt5))`

C

`1/(4 pi in_0) (2qQ)/a ( 1 + 1/(sqrt5))`

D

`1/(4 pi in_0) (2qQ)/a ( 1 + 1/(sqrt5))`

Text Solution

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The correct Answer is:
D
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