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Measurement of heat power ________(a) uses a heat sink(b) uses a thermometer(c) uses a thermocouple(d) uses a black bodyThis question was posed to me at a job interview.This interesting question is from True RMS Responding Voltmeter in section Electronic Instruments of Electrical Measurements

Answer»

Correct CHOICE is (c) USES a thermocouple

The best EXPLANATION: A thermocouple is used to measure the heat POWER in a true R.M.S responding voltmeter. Input voltage under measurement is applied to the heater to which a thermocouple is ALSO attached.



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