Discussion
A thermocouple of 41 \( \mu \)V per \( ^\circ \)C has its reference junction at 25 \( ^\circ \)C and gives 4.10 mV. The measuring junction is at
Answer: C
The emf corresponds to a difference of \( 4100/41 = 100 \) degrees, and adding the reference temperature of twenty-five gives a measuring junction at 125 degrees. Forgetting the cold junction is the commonest error in thermocouple work.
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