1.

Consider a uniform electric field in the hatz direction. The potential is a constant

Answer»

inallspace
for any X for a given z.
for any y for a given z.
on the x-y plane for a given z.

Solution :The direction of electric field is perpendicular to the equipotential surface and here electric field is in z-direction. Electric field is in the direction in which POTENTIAL decreases.
Potential difference per unit DISPLACEMENT perpendicular to equipotential surface at a point gives the magnitude of electric field.
So, equipotential surfaces will be the plane perpendicular to z-axis. Means, along XY plane, which includes any x or y-axis.


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