Electrostatics Question 289
Question: The electric potential at a point on the axis of an electric dipole depends on the distance $ r $ of the point from the dipole as [CPMT 1982; UPSEAT 2001 MP PMT 1996, 2002; MP PET 2001, 05]
Options:
A) $ \propto \frac{1}{r} $
B) $ \propto \frac{1}{r^{2}} $
C) $ \propto r $
D) $ \propto \frac{1}{r^{3}} $
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Answer:
Correct Answer: B
Solution:
Electric potential due to dipole in it’s general position is given by $ V=\frac{k.p\cos \theta }{r^{2}} $
therefore $ V\propto \frac{1}{r^{2}} $
