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

Question

The change in energy stored is ${1 \over 2}C{V^2}\left( {{1 \over K} - 1} \right)$

The charge on the capacitor is not conserved.

The potential difference between the plates decreases K times.

The energy stored in the capaciotor decreases K times.

Solution

Please login to view the detailed solution steps...

Go to DASH