Question

Which line is defined as passing through the centre of a dipole and perpendicular to the dipole axis?

Options

• The axial line

• The equatorial line

• The dipole vector

• The field line

Answer 1

The equatorial line is the perpendicular bisector of the line joining the two charges. It passes through the centre of the dipole at a right angle to the dipole axis. Points on this line are equidistant from both charges, which is a key property used in deriving the electric field at the equatorial line.