Two small electric dipoles each of dipole moment `p hati` are situated at `(0,0,0)` and `(r,0,0)`. The electric potential at a point `((r)/(2),(sqrt(3r))/(2),0)` is:

Options

A. `(p)/(4pi in_(0)r^(2))`
B. 0
C. `(p)/(2pi in_(0)r^(2))`
D. `(p)/(8pi in_(0)r^(2))`

Answer

B

Explanation

As `ON = MN = OM = r`
So its equilateral triangle
`:.` Potential at N due to two dipoles ,
`V = V_(1)+V_(2)=(Kpcos 60^(@))/(r^(2))+(Kp cos(pi -60^(@)))/(r^(2))=0`