Question

Why are alloys used for making standard resistance coils?

Answer 1

Alloys have very small temperature coefficient (less temperature sensitivity) of resistance and high resistivity which keeps the resistance constant even at high temperatures.

In addition, alloys are not affected by atmospheric conditions like air, moisture etc.

Hence, alloys are used for making standard resistance coils.

Final Answer: Alloys have very small temperature coefficient (less temperature sensitivity) of resistance and high resistivity.