1. A coil of aluminum wire has a resistance of 50 when its temperature is 0°C. Determine its resistance at 100°C if the temperature coefficient of resistance of aluminum at 0°C is 0.0038/°c. 2. A coil...

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Extracted text: 1. A coil of aluminum wire has a resistance of 50 when its temperature is 0°C. Determine its resistance at 100°C if the temperature coefficient of resistance of aluminum at 0°C is 0.0038/°c. 2. A coil of copper wire has a resistance of 20 at 18°C. If the temperature coefficient of resistance of copper at 18°C is 0.004/°C, determine the resistance of the coil when the temperature rises to 98°C?