The inroduction fo dielectric slab between the capacitor plates increases the capacitance. Why ?

A capacitor is charged with a battery and then disconnected. A dielectric slab is then inserted between the plates. How are the Capacitance.

A dielectric slab is placed between the plates of a parallel plate capacitor. Its capacitance.

A dielectric slab is placed between the plates of a parallel plate capacitor. Its capacitance

On inserting a dielectric between the plates of a capacitor, its capacitance is found to increase 5 times. What is the relative permittivity of the dielectric?

In a capacitor of capacitance 20muF , the distance between the plates is 2 mm. If a dielectric slab of width 1 mm and dielectric constant 2 is inserted between the plates, what is the new capacitance?