Question

Consider the following operations related to a capacitor connected across a battery initially.

O1 : Disconnecting from battery

O2 : Increasing separation between the plates

O3 : Completely filling up the region between capacitor plates with a dielectric.

The operation sequences after which the energy stored in capacitor will be greater than initial energy stored is

Answer 1

Answer:

The operation sequences after which the energy stored in capacitor will be greater than initial energy stored is

O1---->O3

O1--->  O2

Explanation:

Charge on an isolated capacitor remains constant and potential across a capacitor connected to a given battery is constant.

 Let the dielectric constant be K.

Let e.m.f of the battery be E

Charge stored in capacitor Q = CE

Initial energy  

⇒ C decreases as separation increases

⇒ energy increases

Answer 2

Consider the following operations related to a capacitor connected across a battery initially.

O1 : Disconnecting from battery

O2 : Increasing separation between the plates

O3 : Completely filling up the region between capacitor plates with a dielectric.

The operation sequences after which the energy stored in capacitor will be greater than initial energy stored is

●energy will increase