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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 resistanceI 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

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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