Question

The electric potential in volts due to an electric dipole of dipole moment $2\times {10}^{-8}$ coulomb-meter at a distance of 3m on a line making an angle of ${60}^o$ with the axis of the dipole is

• A. Zero
• B. 10
• C. 20
• D. 40

Answer 1

The correct option is A Zero

Dipole moment $=2\times {10}^{-8}cm$

distance $=3m$

angle $={60}^0$

axis of dipole $=0$ because in this context $d=0$

hence $\rho =2q\times d$ ($d=0$)

$=0$