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Point charge q moves from point P to poi...

Point charge q moves from point P to point S along the path PQRS (figure shown) in a uniform electric field E pointing co-parallel to the positive direction of the x-axis. The coordinates of the points P, Q, R and S are `(a, b, 0), (2a, 0, 0) , (a, -b, 0) and (0, 0,0)` respectively. The work done by the field in the above process is given by the expression.

A

`qEa`

B

`-qEa`

C

`qEa sqrt(2)`

D

`qE sqrt( (2a)^2 +b^2)`

Text Solution

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The correct Answer is:
B
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