what is the meant by dielectric strength of a medium?

Define dielectric Constant of a medium.

What is meant by electric current?

What is dielectric ?

What is the unit of dielectric constant?

An air capacitor is given a charge of 2muC raising its potential to 200 V. If on inserting a dielectric constant its potential falls to 50V, what is the dielectric constant of the medium?

In a parallel plate capacitor, the capacitance increases from 4 muF to 80muF no introduicng a dielectric medium between the plates. What is the dielectric constant of the medium?

A parallel plate capacitor has a capacity of 6 muF (Micro farad), with air in between the plates and 60 muF (Micro farad) when dielectric medium is introduced.What is the dielectric Constant (K ) of the medium ?