Constantan used in thermocouples is an alloy of___________________?
Correct answer: A. None of these
- A. None of these
- B. Copper & aluminium
- C. Lead & tin
- D. Iron & copper
Explanation
Constantan is a copper-nickel alloy, typically containing about 55% copper and 45% nickel, and is used with copper in thermocouples. Since copper and nickel are absent from the listed pairs, none of these is the valid option.
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