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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-ohmThis 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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Answer» 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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