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At the surface of a charged conductor electrostatic field must be normal to the surface at every point'. Explain. |
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Answer» Solution :If `vecE` were not normal to the surface, it WOULD have some non-ZERO component along the sudace. Free charges on the surface of the conductor would then experience FORCE and move. Hence, conductor does not remains in stable siluation. Therefore `vecE` should have no TANGENTIAL component pardllel lo the surface in stable situation. Thus, electrostatic field at the surface of a charged conductor MUST be normal to the surface at every point. (For a conductor without any surface charge density, field is zero even at the surface). 
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