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Which of the following statements are true about insulators?(a) Insulators have a positive temperature coefficient(b) Insulators have a negative temperature coefficient(c) Insulators have zero temperature coefficient(d) Insulators have infinite temperature coefficient |
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Answer» Right choice is (b) Insulators have a negative temperature coefficient The best explanation: Insulators have a negative temperature coefficient because as temperature increases, the resistance of insulators decreases. |
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