What is dielectric withstand voltage?
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Description : Define : (i) Dielectric strength (ii) Breakdown voltage

Answer : (i) Dielectric strength: The voltage which a dielectric material can withstand without breaking down (without losing its dielectric property) is called its dielectric strength. It is represented by kV/mm ... or is no longer an insulator) for a specified thickness, is its breakdown voltage. 

Description : The frequencies and voltage used in Dielectric heating are (A) 10 – 30 MHz, upto 25 kV (B) 50 – 60 Hz, upto 25 kV (C) 10 – 30 MHz, upto 100 V (D) 50 – 60 Hz, 110 V – 230 V

Answer : The frequencies and voltage used in Dielectric heating are 10 – 30 MHz, upto 25 kV

Description : What is dielectric breakdown strength?

Description : What is dielectric strength of an insulating material? What is its unit?

Answer : Dielectric Strength: The dielectric strength of an insulating material is the maximum voltage which the insulating medium can withstand without breakdown. Unit is volts per millimeter (V/mm), or kV/mm or kV/cm

Description : What is the difference between an insulator and a dielectric?

Answer : Dielectric is the another name for insulator.