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Which of the following has negative temperature coefficient?

A. Carbon

B. Nickel

C. Brass

D. Constantan

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    An impedance given by 90 -45 is a/an ___ impedance.
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  15. An alloy composed of 84 % coppera 12 % manganese and 4 % nickel.
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  21. The resistance of an insulator ___ when its temperature is increased.
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  25. An ac series circuit is composed of a resistance of 20 a inductive reactance of 40 a and a capacitive…
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