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CBSE - XII Science - Physics - Electrostatic Potential and Capacitance

in ncert textbook for the derivation of electric field in the capacitors the formula for the electric field due to an infinitely charged plate is used instead of that due to a conductor. how is this right?

Asked by aishwaryajoshi 13th December 2011, 6:54 PM
Answered by Expert


there is no contradiction.
in the text book the  net electric field in the region between the plates is ?/?0  (comes from adding the el fld due to each plate which are in same direction in the region between) , where as the el field due to each plate is ?/2?0.
in HCVerma, electric field in that region has been calculated from Gauss's law.
where total flux through the gaussian surface is taken ?A/?0.and "A" cuts from both sides . so the electric field at the region in betweenbecomes ?/?0 .
Answered by Expert 14th December 2011, 1:09 PM

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