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A point charge q moves from point P to p...

A point charge q moves from point P to pont S along the path PQRS (fig.) in a uniform electric field E pointing parallel to the poistive direction of the X-axis. The coordinates of the points P, Q, R and S are(a, b, O), (2a, O, O)(a, -b,`ulO`) and `(O, O, O) respectively. The work done by the field in the above process is given by the expresison............

Text Solution

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The correct Answer is:
A
Work done from P to M `=vecF.vec(PM)`
`=F(PM)cos90^@=0`

Work done from M to `S=vecF.vec(MS)`
`=F(MS)cos180^@` `[:' F=qE]`
`=-qEa`
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