______________ is undesirable in thermocouples used in industries ?
Correct answer: D. Non-linear relation of emf to temperature
- A. Linear relation of emf to temperature
- B. Corrosion resistance
- C. Oxidation resistance
- D. Non-linear relation of emf to temperature
Explanation
A useful industrial thermocouple should give an emf that changes nearly linearly with temperature, while resisting oxidation and corrosion. Therefore, a nonlinear emf-temperature relation is undesirable because it complicates calibration and measurement.
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