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Four charges +q, +q, -q, -q are fixed re...

Four charges +q, +q, -q, -q are fixed respectively at the corners of A, B, C and D of a square of side 'a' arranged in the given order. Calculate the electric potential and intensity at O (Center of square). If E and F are the midpoints of sides BC, CD respectively, what will be the work done by external agent in carrying a charge Q slowly from O to E and from O to F ?

Text Solution

Verified by Experts

The correct Answer is:
`0, (4sqrt(2) qk)/a^(2), 0, (4Qqk)/a [1/sqrt(5)-1]`
where `k=1/(4pi in_(0))`
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