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Two metallic plates form a parallel plate capacitor. The distance between the plates is 'd'. A metal sheet of thickness d/2 and of area equal to area of each plate is introduced between the plates. What will be the ratio of the new capacitance to the original capacitance of the capacitor ?

1. 2: 1
2. 1: 2
3. 1: 4
4. 4: 1

Correct answer: 2: 1

Solution

Introducing a metal sheet of thickness d/2 between the plates effectively divides the capacitor into two capacitors in series, each with a distance of d/2 between the plates. This configuration increases the overall capacitance, resulting in a new capacitance that is double the original capacitance.

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