Final answer:
The electric potential at the equatorial point of a small dipole with dipole moment P and distance r from the dipole is given by the formula: Electric potential = P / (4πε₀r²). Therefore, the correct option is B.
Step-by-step explanation:
The electric potential at the equatorial point of a small dipole with dipole moment P and distance r from the dipole can be calculated using the formula:
Electric potential = P / (4πε₀r²)
Where P is the dipole moment, r is the distance from the dipole, and ε₀ is the permittivity of free space.
Therefore, the correct answer is B. P / (4πε₀r²).