A coil is connected across a constant dc source of 120V. It drawa a current of 12A at room temperature of 25°C. After 5 hours of operation, its temperature rises to 65°C and current reduces to 8A. Calculate: a. Current when its temperature has increased to 80°C [Ans: 7.111A] b. Temperature coefficient of resistance at 30°C [Ans: 0.01176/°C]
A coil is connected across a constant dc source of 120V. It drawa a current of 12A at room temperature of 25°C. After 5 hours of operation, its temperature rises to 65°C and current reduces to 8A. Calculate: a. Current when its temperature has increased to 80°C [Ans: 7.111A] b. Temperature coefficient of resistance at 30°C [Ans: 0.01176/°C]
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A coil is connected across a constant dc source of 120V. It drawa a current of 12A at room
temperature of 25°C. After 5 hours of operation, its temperature rises to 65°C and current
reduces to 8A. Calculate:
a. Current when its temperature has increased to 80°C [Ans: 7.111A]
b. Temperature coefficient of resistance at 30°C [Ans: 0.01176/°C]
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