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Two point charges Q and – Q are located on two opposite corners of a square as shown in figure. If the potential at the corner A is taken as 1 V, then the potential at B, the centre of the square will be—
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- Zero
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1 V √2 - 1 V
- √2V
Correct Option: C
The plane midway between a and – a, i.e., the one passing through ABC and perpendicular to the plane of the paper is an equipotential plane.
Hence the potential at B is the same as that of A or C, i.e., 1 V.
