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Topic

Properties of Electrical Materials · Question 1

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A. Semiconductor, electrical & thermal properties of materials

The copper field winding of a dc motor has a resistance of 80 Ω at 20 °C. The temperature coefficient of resistance of copper is α = 0.00393 per °C (referenced to 20 °C). When its temperature rises to 80 °C, its resistance is most nearly:

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