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If the potential difference in a material is 4MV and the thickness of the material is 2m, calculate the dielectric strength.(a) 2MV/m(b) 4MV/m(c) 6MV/m(d) 8MV/mThis question was addressed to me in an online interview.This key question is from Dielectric Strength topic in portion Capacitance and Capacitors of Basic Electrical Engineering

Answer»

Right choice is (a) 2MV/m

Easy EXPLANATION: Dielectric strength is the potential GRADIENT required to CAUSE a BREAKDOWN in the material. Potential gradient is the RATIO of voltage and thickness.

Dielectric strength= V/t= 4/2= 2MV/m.



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