The subsequent problems deal with the figure and table below
For a Type J (Iron-Constantan) thermocouple configuration (as shown above) with a 0°C reference (Tref):
where Vemf is the voltage difference produced by the junction pair (Vemf = VA ? VB in the figure).Assume that nodes A and B are at the same temperature, unless indicated otherwise. Assume that the op amp is ideal.If the reference temperature is 0°C, R1=1k?, R2=10k?, and the temperature to be measured is 20°C what is the voltage at node A?
A. 0.762 mV
B. 0.507 mV
C. 0 mV
D. 11.21 mV
E. 1.019 mV
Answer: E
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