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Define an equipotential surface. Draw equipotential surfaces (i) in the caseof a single point charge. (ii) in a constantelectric field in Z direction. Why the euipotential surfaces about a singlecharge are not equidistant ? (iii) Can electric field exist tangential to an equipotential surface ? Give reson. |
Answer» SOLUTION : (i) An equipotential SURFACE is that at everypointof which electricpotential is the same. Due to a single POINTCHARGE, equipotnetial surfaces are centredat the charge, As `V prop (1)/(r )`, the equipotential surfaces about a single charge cannot be equidistant. (II) In a constant electricfieldin Z- direction, equipotential surfaceslie in XY plane perpendicular to Z-direction as shown in Fig.  (iii) As electric fiedis perpendicular to the equipotentialsurface, the field cannot existtangenital to the equipotential surface. |
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