Question

(a) Write two important characteristics of equipotential surface.

(b) A thin circular ring of radius r is changed uniformly, so that its linear charge density becomes λ. Derive
an expression for the electric field at a point P at a distance x from it along the axis of the ring, Hence
prove that a large distances (x>>r), the ring behaves as a point of charge.​

Answer 1

Answer:

• Equipotential surfaces never cross each other.

• Equipotential surfaces give the direction of the electric field.

• Electric field is normal to the equipotential surfaces.

Explanation:

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