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Four charges +q,+2q,+3q and +4q are plac...

Four charges +q,+2q,+3q and +4q are placed at the four corners ABCD of a square of side a. Calculate the field and potential at the centre of the square.

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The correct Answer is:
`E=(sqrt2q)/(piepsilon_0a^a)j` away from the centre and perpendicular to the line joining `+3q` and +4q, `V=(5q)/(sqrt2piepsilon_0a)`
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NN GHOSH-ELECTRIC FIELD AND POTENIAL-EXERCISE-B
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