Find the thermo-emf developed in a copper-silver thermocouple when the junctions are kept at 0°C and 40°C.
Find the thermo-emf developed in a copper-silver thermocouple when the junctions are kept at 0°C and 40°C. Use the data in table (33.1).
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E = aABθ + bABθ2
aCuAg = aCuPb – bAgPb = 2.76 – 2.5 = 0.26μv/°C
bCuAg = bCuPb – bAgPb = 0.012 – 0.012μvc = 0
E = aABθ = (0.26 × 40)μV = 1.04 × 10–5V
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