Identify the incorrect statement among the following
Electrostatic field at the surface of a charged conductor is proportional to the surface charge density
There is no net charge at any point inside conductor when a charge is placed outside it
Inside charged or neutral conductor, electrostatic field is zero
The electrostatic field at surface of charged conductor must be tangential to surface at any point when placed in external electric field
Solution:
Under electrostatic conditions, the electric field at the surface of a charged conductor must be perpendicular (normal) to the surface at every point. It cannot be tangential, otherwise charges would flow along the surface.
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