Effect of dielectric on energy stored in a capacitor when battery connected and disconnected

Effect of dielectric materiel on energy stored in a capacitor when battery connected and disconnected is the topic of this video lesson. we know that capacitor is a device that stores electric charge and energy in a circuit. The energy stored in a capacitor is effected when we insert a non conducting dielectric material between the plates of the capacitor. Its effect is different in two different cases. When battery is kept connected, potential of the system remains same and extra charge is induced between the plates so that capacity and hence energy of the capacitor increases by dielectric constant times. When battery is disconnected from the circuit, charge between the plates remains same and due to dielectric material potential between the plates decreases by dielectric constant times. Hence capacity increases by dielectric constant times in this case too but energy between the plates decreases by dielectric constant times.

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