Constantan is an alloy of____________________?
Correct answer: D. Cu (55%) & Ni (45%)
- A. Cu (55%) & Sn (45%)
- B. Fe (80%) & Ni (20%)
- C. Pt (95%) & Rh (10%)
- D. Cu (55%) & Ni (45%)
Explanation
Constantan is a copper-nickel alloy, commonly containing about 55% copper and 45% nickel. Its high electrical resistance and low temperature coefficient make it useful in resistance wires and thermocouples.
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