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(a) What is an equi-potential surface? Show that the electric field is always directed perpendicular to an equi-potential surface. (b) Derive an expression for the potential at a point along the axial line of a short electric
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(a) What is an equi-potential surface? Show that the electric field is always directed perpendicular to an equi-potential surface.
(b) Derive an expression for the potential at a point along the axial line of a short electric dipole?
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