A parallel plate air capacitor of capacitance $C$ is connected to a cell of $e m F V$ and then disconnected from it. A dielectric slab of dielectric constant $K$ , which can just fill the air gap of the capacitor, is now inserted in it. Which of the following is incorrect ?

The potential difference between the plates decreases K times

The energy stored in the capacitor decreases K times

The change in energy stored is

\frac{1}{2} C V^{2} (\frac{1}{K} - 1)

The charge on the capacitor is not conserved

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A parallel plate air capacitor of capacitance

C

is connected to a cell of

e m F V

and then disconnected from it. A dielectric slab of dielectric constant

K

, which can just fill the air gap of the capacitor, is now inserted in it. Which of the following is incorrect ?

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Question Text

A parallel plate air capacitor of capacitance

C

is connected to a cell of

e m F V

and then disconnected from it. A dielectric slab of dielectric constant

K

, which can just fill the air gap of the capacitor, is now inserted in it. Which of the following is incorrect ?

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