Two parallel metal plates having charges $+Q$ and $- Q$ 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
AIPMT 2010, Easy
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Electric field between two parallel plates placed in vacuum is given by
$E=\frac{\sigma}{\varepsilon_{0}}$
In a medium of dielectric constant $K, E^{\prime}=\frac{\sigma}{\varepsilon_{0} K}$
For kerosene oil $K > 1 \Rightarrow {E^\prime } < E$
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