Question

By which material is a potentiometer wire normally made and why

Answer 1

Explanation:

manganin

___________

Answer: Generally alloys like constantan or manganin are used as potentiometer wire because they posses high specific resistance and low temperature coefficient.

Answer 2

The potentiometer wire is normally made of alloys constantan and manganin.

This is because they have high resistivity and low temperature coefficient of resistance so that :

•the overall resistance of the wire is high and,

• the potential difference across its ends is measurable.