Four +9 µC point charges are at the corners of a square of side 4 m. Find the potential at the center of the square (relative to zero potential at infinity) for each of the following conditions.(a) All the charges are positive
(b) Three of the charges are positive and one is negative
(c) Two are positive and two are negative

Answer with Explanation:

We are given that

Side of square,d=4 m

Distance of charge from the center of square,d=

Potential is a scalar quantity therefore, we consider sign .

a.When all charges are positive

Then, Potential at center of square,V=

Where

b.Potential at center of square,V=

c.Potential at center of square,V=

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explanation:

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