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Most suitable material for a thermocouple is ________

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Most suitable material for a thermocouple is ________

(a) brass

(b) gold

(c) platinum

(d) silver

The question was asked by my college director while I was bunking the class.

Question is from Thermoelectric Transducer topic in chapter Transducers of Electrical Measurements

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Correct choice is (c) platinum

For explanation: Platinum is the most suitable material for constructing thermocouples. It has a very high sensitivity. Constantan is the other material (alloy) with a composition of 40 % of Ni and 60 % of Cu used in a thermocouple.

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