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

Options

(a) remain same
(b) become zero
(c) increases
(d) decrease

Correct Answer:

decrease

Explanation:

Electric field E = σ / ? = Q / A?
? of kerosine oil is more than that of air. As ? increases, E decreases.