Physics > Capacitors > 9.0 Dielectrics (Insulators) and Polarization
Capacitors
1.0 Introduction
2.0 Different types of capacitors and its capacitance.
3.0 Parallel Plate Capacitor
3.1 When equal and opposite charges placed on plates
3.2 When unequal charges are placed on the two plates
4.0 Capacitance of spherical conductor
5.0 Capacitance of a earthed sphere by a concentric spherical shell
6.0 Capacitance of a cylindrical capacitor
7.0 Mechanical force on the charged conductor
8.0 Redistribution of Charge
9.0 Dielectrics (Insulators) and Polarization
9.1 Effect of Dielectric
9.2 Capacitance of a Capacitor Partially Filled with Dielectric
9.3 Quantities after inserting dielectric in a capacitor (fully)
10.0 Combination of capacitors
11.0 Energy Density ($u$)
12.0 $R$-$C$ Circuits
13.0 Method of Finding Equivalent Capacitance
14.0 Some important concepts
15.0 Van De Graaff Generator
9.3 Quantities after inserting dielectric in a capacitor (fully)
3.2 When unequal charges are placed on the two plates
9.2 Capacitance of a Capacitor Partially Filled with Dielectric
9.3 Quantities after inserting dielectric in a capacitor (fully)
As we know the electric field, potential difference and charge are propotional to each other and after inserting the dielectric in capacitor electric field become ${1/K}^ {th}$ of the original. Hence the potential difference and charge also become ${1/K}^ {th}$ of the original.
New capacity is calculated by multiplying by $K$ to the original capacity. And by the expression of the energy stored in capacitor new energy stored in capacitor is $1/{K^3}$of the original. And the force between the plates of the capacitor is given by $1/{K^2}$ of the original.
