Question

CHOOSE THE CORRECT ANSWER Resistance of a material at 20°C and 40°C are 45 Ω and 85 Ω respectively. Find its temperature coefficient of resistivity. (a) 0.4 per°C (b) 0.0044 per°C (c) 0.044 per°C (d) 60.0044 per°C​

Answer 1

Answer:

correct answer is (a)

Explanation:

we know that R t = R 0 (1+aT) where R t = resistance at temp. t, R o = resistance at temperatures t = 0°C and a = temperature coefficient of resistance.

From there it is in the link documents

Answer 2

Explanation:

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