A parallel plate air capacitor of capacitance $C$ is connected to a cell of emf $V$ 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 $?$
A parallel plate air capacitor of capacitance $C$ is connected to a cell of emf $V$ 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 $?$
- [AIPMT 2015]
- A
The energy stored in the capacitor decreases $K$ times.
- B
The potential difference between the plates decreases $K$ times.
- C
The change in energy stored is $\frac{1}{2}C{V^2}\left( {\frac{1}{K} - 1} \right)$ છે.
- D
The charge on the capacitor is not conserved.
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- [AIIMS 2014]