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Which of the following is the correct expression for the dielectric strength?

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Which of the following is the correct expression for the dielectric strength?

(a) d/Vb

(b) Vb/d

(c) Vbd

(d) Vb/d^2

The question was asked in class test.

This intriguing question originated from Dielectric Breakdown topic in portion Dielectrics of Engineering Physics II

1 Answer

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Right choice is (b) Vb/d

For explanation I would say: The dielectric strength is also defined as the maximum potential gradient to which a dielectric can be subjected with insulation breakdown. The expression is: Vb/d, where Vb is the breakdown voltage and d is the thickness of the specimen.

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