Equipotential surfaces are perpendicular to field lines. Why ?

The flux linked with a surface perpendicular to the field lines in an electric field will be __________ .[Fill in the blank]

Angle between equipotential surface and electric field line of force is:

The angle between the equipotential surface and the electric field (or line of force) at any point on the equipotential surface is

The angle between the equipotential surface and the electric field (or line of force) at any point on the equipotential surface is

What do you mean by equipotential line? State the properties of equipotential lines. Show that electric lines of force and equipotential lines are mutually perpendicular to each other.

Angle between equipotential surface and electric field is ......