Question

(a) Define equipotential surface. Mention the angle
between the equipotential surface and the lines
of force on this surface.​

Answer 1

Answer:

If all the points of a surface are at the same electric potential, then the surface is called an equipotential surface.i t means…

(i) In case of an isolated point charge, all points equidistant from the charge are at same potential. Thus, equipotential surfaces in this case will be a series of concentric spheres with the point charge as their centre. The potential, will however be different for different spheres..

If the charge is to be moved between any two points on an equipotential surface through any path, the work done is zero. This is because the potential difference between two points A and B is defined as VB – VA = WAB/q

If VA = VB then WAB = 0. Hence the electric field lines must be normal to an equipotential surface.

(ii) In case of uniform field, equipotential surfaces are the parallel planes with their surfaces perpendicular to the lines of force.

Explanation:

Hope it helps uu...

Answer 2

Answer:

An equipotential surface is a surface that exists with the same electrical potential at each point. If any point lies at the same distance from the other, then the sum of all points will create a distributed space or a volume.

The angle between equi-potential surface and lines of force  is always 90 degree.

EXPLANATION

The angle between equi-potential surface and lines of force  is always 90 degree because when the electric potential becomes constant,the negative potential gradient  becomes zero, and thus it  makes it necessary for the Electric field to be always normal with surface