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Answer: b
Explanation: The total potential at the point P due to the dipole is given by the difference of the potentials of the individual charges.
V = V1 + (-V2), since both the charges are unlike. Thus V = V1 – V2.
The potential (V) due to an electric dipole at a point P in space is given by the equation:
[ V = frac{1}{4piepsilon_0} cdot frac{p cdot cos(theta)}{r^2} ]
Where:
– (V) is the potential at point P due to the dipole.
– (epsilon_0) is the permittivity of free space.
– (p) is the electric dipole moment, which is the product of the magnitude of one of the charges and the distance between them.
– (r) is the distance from the center of the dipole to the point P.
– (theta) is the angle between the dipole axis and the line joining the point P to the center of the dipole.