Which of the following is the output of a thermocouple ?
Correct answer: D. D.C. voltage
- A. Alternating current
- B. Direct current
- C. A.C. voltage
- D. D.C. voltage
- E. None of the above
Explanation
A thermocouple converts a temperature difference into a thermoelectric emf, whose polarity is fixed for a given temperature gradient. Thus its output is a D.C. voltage, not an alternating current or voltage.
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