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Which of the following is not a property of a good electrical insulator?

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Which of the following is not a property of a good electrical insulator?

(a) It has high electrical resistance

(b) It has a high dielectric strength

(c) It has a high dielectric constant

(d) It has a high thermal resistance

I have been asked this question in an internship interview.

My question is from Miscellaneous Materials topic in chapter Miscellaneous Materials, Plain and Reinforced Cement Concrete of Construction & Building Materials

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Best answer
Correct choice is (c) It has a high dielectric constant

The best explanation: A good electrical insulator has high electrical resistance and high thermal resistance. It has high dielectric strength and low dielectric constant.

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