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Four charges -q,-q,+q and +q are placed at the corners of a square of side 2 L is shown in figure. The electric potential at point A midway between the two charges +q and +q is -(a) \(\frac{1}{4\pi∈_0}\) \(\frac{2q}{L}\) \((1-\frac{1}{\sqrt 5})\) (b) \(\frac{1}{4\pi∈_0}\) \(\frac{2q}{L}\) \((1+\frac{1}{\sqrt 5})\) (c) \(\frac{1}{4\pi∈_0}\) \(\frac{q}{L}\) \((1-\frac{1}{\sqrt 5})\) (d) zero |
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Answer» Option : (a) \(\frac{1}{4\pi∈_0}\) \(\frac{2q}{L}\) \((1-\frac{1}{\sqrt 5})\) |
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