Question
The resistance of a certain size of copper wire is given as: R = R 0 [1 + (T 20)] Where R 0 =
The resistance of a certain size of copper wire is given as:
R = R 0 [1 + α(T – 20)]
Where R 0 = 6 ± 0.3 percent is the resistance at 20°C, α = 0.004°C -1 ± 1 percent is the temperature coefficient of resistance, and the temperature of the wire is T = 30 ± 1°C. Calculate the resistance of the wire and its uncertainty.
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