Q. An electric dipole has a dipole moment $p$. The electric potential at a point $P$ on the perpendicular bisector and at a distance $d$ from the dipole is

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A

$0$

B

$\frac{P}{4 \pi t_{0} d^{2}}$

C

$\frac{P d}{4 \pi t_{0}}$

D

$\frac{3 P}{4 \pi t_{0} d^{2}}$

Solution:

Potential at $A=\frac{+k q}{\sqrt{r^{2}+l^{2}}}-\frac{k q}{\sqrt{r^{2}+l^{2}}}=0$

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