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Q The resistance of a platinum wire at 0oC is 4 Ω. What will be the resistance at 100oC, if the temperature coefficient of resistance is 0.0038/oC.
Resistance at 100oC Rt = Ro (1+ αt)
= 4 (1 + (0.0038 × 100))
Rt = 5.52 Ω
Result: The resistance increases with the temperature.
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