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The insulating capacity of material against high voltages is known as _______

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The insulating capacity of material against high voltages is known as _______

(a) Dielectric strength

(b) Thermoelectricity

(c) Electromechanical effect

(d) Electrochemical effect

I had been asked this question in an online quiz.

I'd like to ask this question from Electrical Properties in chapter Properties of Engineering Materials of Engineering Material & Metallurgy

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The correct choice is (a) Dielectric strength

To explain: The dielectric strength of a material is its insulating capacity against a high voltage. The process by which two dissimilar metals join and produce a voltage is known as thermoelectricity. The electrical effect in a material is the relation between electrical energy and chemical change (as in batteries) and that of electromechanical effect is in an electrically operated mechanical device (as radar).

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