Question

What do you mean by dielectric strength of a medium?

Answer 1

In physics, the term dielectric strength has the following meanings: Of an insulating material, the maximum electric field that a pure material can withstand under ideal conditions without breaking down.

Answer 2

the maximum voltage that can be applied to a given material without causing it to break down, usually expressed in volts or kilovolts per unit of thickness. Compare breakdown voltage. Examples from the Web for dielectric strength.