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A copper coil has a resistance of 200 ohms when its mean temperature is 0 degree centigrade. Calculate the resistance of the coil when its mean temperature is 80 degree centigrade. Temperature coefficient of copper is 0.004041 centigrade^-1

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A copper coil has a resistance of 200 ohms when its mean temperature is 0 degree centigrade. Calculate the resistance of the coil when its mean temperature is 80 degree centigrade. Temperature coefficient of copper is 0.004041 centigrade^-1

(a) 264.65 ohm

(b) 264.65 kilo-ohm

(c) 286.65 ohm

(d) 286.65 kilo-ohm

This question was posed to me in unit test.

I'm obligated to ask this question of Temperature Coefficient of Resistance topic in division Simple DC Networks of Basic Electrical Engineering

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Right choice is (a) 264.65 ohm

Explanation: R=R0(1+α dT) = 200(1+ 0.004041*80) = 264.65 ohm.

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