Question

Constantan wire is used for making standard resistance, because it has

• A. high melting point.
• B. low specific resistance.
• C. high specific resistance.
• D. negligible temperature coefficient of resistance.

Answer 1

Answer: (D)

negligible temperature coefficient of resistance.

Constantan is a copper-nickel alloy. Its main feature is its resistivity, which is constant over a wide range of temperatures. Thus it has low temperature coefficient of resistance.that's why it is used for making of standard resistances . Hence correct option is option D