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प्रश्न
Why must electrostatic field at the surface of a charged conductor be normal to the surface at every point? Give reason?
उत्तर
Electric field is defined to be the gradient of potential and the surface of a conductor has a constant potential. Therefore, there is no field along the surface of the conductor and, hence, the electrostatic field at the surface of a charged conductor should be normal to the surface at every point.
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