MCQ
Constantan wire is used for making standard resistance, because it has:
- AHigh melting point.
- BLow specific resistance.
- CHigh specific resistance.
- ✓Negligible temperature coefficient of resistance.
✓
Answer
Correct option: 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.
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