Shown a parallel plate capacitor with plates of width `b` and length `l`. The separation between the
Channel: Doubtnut
Date: 2020-07-12

Shown a parallel plate capacitor with plates of width `b` and length `l`. The separation between the  platesis d. The plates are rigidly  clamped and connected  to a battery of emf V. A dielectric slab of thickness d and  dielectric constant K  is slowly inserted between the plates. (a)  Calculate the energy of the system when a length x of the slab is introduced into the capacitor. (b) what force should be applied on teh slab to ensure that is goes slowly into the capacitor? Neglect any effect of friction or gravity.