GENERAL KNOWLEDGE

Detailed explanation-1: -The electric field lines are always perpendicular to an equipotential surface.

Detailed explanation-2: -The equipotential surfaces are always perpendicular to the direction of the field. This is because if the electric field is not perpendicular to the equipotential surface there would have existed some nonzero component along the surface.

Detailed explanation-3: -These equipotential surfaces are always perpendicular to the electric field direction, at every point.

Detailed explanation-4: -Field lines and equipotential surfaces are always mutually perpendicular. Shown are cross sections of equipotential surfaces (blue lines) and electric field lines (red lines) for a single positive charge.

Detailed explanation-5: -An equipotential surface is the collection of points in space that are all at the same potential. Equipotential lines are the two-dimensional representation of equipotential surfaces. Equipotential surfaces are always perpendicular to electric field lines. Conductors in static equilibrium are equipotential surfaces.