Question

why must electrostatic field at the surface of a charge conductor be perpendicular to every point on it ?

Answer 1

Because if electrostatic force is present at some angle then it will have two components that is vertical and horizontal component due to which at a particular time there will be two directions of current which is not possible

Answer 2

Answer:

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Explanation:

So that tangent on charged conductor gives the direction of the electric field at that point.