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Question

Physics Question on Electrostatics

Which one is the correct expression of electric potential on the axial point of a dipole whose dipole moment is р and length is 2l, at a distance of r?

A

pr2\frac{p}{r^2}

B

p2lr\frac{p}{2lr}

C

p(r2−l2)2\frac{p}{(r^2-l^2)^2}

D

pl2\frac{p}{l^2}

Answer

pr2\frac{p}{r^2}

Explanation

Solution

The correct option is (C): p(r2−l2)2\frac{p}{(r^2-l^2)^2}