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A platinum coil has a resistance of 3.146Ω at 40°C and 3.767 Ω at 100°C.

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A platinum coil has a resistance of 3.146Ω at 40°C and 3.767 Ω at 100°C. Find the resistance at 0°C and the temperature-coefficient of resistance at 40°C.

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R100 = R0(1 + 100α0) ...(i)

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