NEET Physics Electric Potential MCQ Question
For a dipole at the origin, the electric potential V at a distance r along the dipole axis is given by V = (1/4πε₀) × (p/r²). If the dipole moment p is doubled and the distance r is halved, how does the electric potential V change?
V is increased by a factor of 8.
V is increased by a factor of 4.
V is decreased by a factor of 2.
V remains unchanged.
Correct Answer
Detailed Explanation
Doubling p and halving r results in V = (1/4πε₀) × (2p/(r/2)²) = (1/4πε₀) × (8p/r²), increasing V by a factor of 8.
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