Calculate the electric potential at point P on the y−axis.
A
0
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B
V=q4πϵo√a2+y2
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C
V=2q4πϵo√a2+y2
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D
V=q4πϵo√y2−a2
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Solution
The correct option is A0 Electric potential is a scalar quantity. It depends on the magnitude of source charge and the distance. Since the magnitude of charge is same in both the charges, the potential cancels out at each point on the y axis due to same distance from the charges.