Question Detail
Question
Two identical conducting plates of plate area A are separated by a distance d to form a parallel plate air capacitor. Now a metal sheet of thickness d/2 is inserted between the plates of the capacitor. The ratio of capacitance before the insertion of plate and after the insertion of plate is
Correct Answer
Option A is the correct answer.
Detailed Explanation
A metal sheet effectively reduces the separation. New separation = d - d/2 = d/2. Capacitance doubles, so ratio is 1:2
Hint
Conductors have 'infinite' dielectric constant, reducing effective distance.