Question

Power in a thermocouple is given by ________

(a) Power =  E^2 rms / Rheater

(b) Power = E^2 rms

(c) Power = Rheater

(d) Power = E^2 rms × Rheater

I got this question in an interview.

I'd like to ask this question from True RMS Responding Voltmeter topic in portion Electronic Instruments of Electrical Measurements

Answer 1

The correct answer is (a) Power =  E^2 rms / Rheater

For explanation I would say: The power consumed in a thermocouple is given by the relation

Power =  E^2 rms ⁄ Rheater

where, Erms is the r.m.s value of the a.c. input signal

            Rheater is the resistance of the heater.