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Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature | |
A. | emf produced is very low of the order of microvolt. [Wrong Answer] |
B. | embrittlement of iron occurs. [Wrong Answer] |
C. | rusting of iron takes place. [Wrong Answer] |
D. | both (b) and (c). [Correct Answer] |