Class 12 Physics, CBSE and UP Board, Electrostatic Potential and Capacitance, Additional Exercise,Chapter-2 Exercise 2.34,NCERT Solutions for Class 12 Physics
Describe schematically the equipotential surfaces corresponding to (a) a constant electric field in the z-direction, (b) a field that uniformly increases in magnitude but remains in a constant (say, z) direction,(c) a single positive charge at the origin, and (d) a uniform grid consisting of long equally spaced parallel charged wires in a plane.
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Ans (a).
Equidistant planes parallel to the x-y plane are the equipotential surfaces.
Ans (b).
Planes parallel to the x-y plane are the equipotential surfaces with the exception that when the planes get closer, the field increases.
Ans (c).
Concentric spheres centered at the origin are equipotential surfaces.
Ans (d).
A periodically varying shape near the given grid is the equipotential surface. This shape gradually reaches the shape of planes parallel to the grid at a larger distance.