NEET 2010 Physics question
Two parallel metal plates having charges and face each other at a certain distance between them. If the plates are now dipped in kerosene oil tank, the electric field between the plates will
Answer: (3)
Solution
The charges on the plates stay constant, so the surface charge density is unchanged. In vacuum the field between the plates is . In a dielectric medium of dielectric constant the field becomes $E' =
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