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Why are electric field lines perpendicul...

Why are electric field lines perpendicular at a point on an equipotential surface of a conductor ?

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On equipotential surface `Delta V = 0 ` As ` Delta V = vec(E).Delta vec(r)`, So `vec(E)` is perpendicular to `Delta vec(r)`
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Knowledge Check

  • Equipotential surfaces,

    A
    Are closer in regions of large elelctric fields compared to regions of lower electric fields
    B
    will be more crowded near sharp edges of a conductor.
    C
    will be more crowded near regions of large charge densities.
    D
    will always be equally spaced.
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