Question

The direction of electric field intensity ( E ) at a point on the equatorial line of an electric dipole of dipole moment P is

• A. along the equatorial line towards the dipole
• B. along the equatorial line away from the dipole
• C. perpendicular to the equatorial line and the opposite to p
• D. perpendicular to the equatorial line and parallel to p
• E. along the axial line in the direction of p

Answer 1

Answer: (C)

At equatorial line
$E_e=\frac{1}{4\pi {\epsilon }_0}\frac{p}{r^3}$
and it will be directed from +q charge to -q charge.
Electric field intensity at a point on the equatorial line will be perpendicular to the equatorial line.