Two metal plates carrying charges Q and -Q face each other at some separation and are immersed in an oil tank. If the oil is drained out, the electric field between the plates will

Step-by-step solution

The electric field between two oppositely charged parallel plates is given by E = Q A ₀ K , where Q is the magnitude of charge on the plates, A is the area of the plates, and K is the dielectric constant of the medium between them. When the plates are immersed in oil, the dielectric constant of the medium is K > 1 . When the oil is drained out, the medium between the plates becomes air or vacuum, for which the dielectric constant is K = 1 . Since the charge Q on the isolated plates remains constant and the dielectr