Question

why the potential metre wire should have low value of temperature of coefficient of resistance​

Answer 1

potentiometer wire should be of high specific resistance so that even a comparable smaller length of the material allloy could suffice to give desired value of resistance ALso it must have low temperature coeefficient because it would be independent of the surrounding changes in temperature while taking the reading

Answer 2

Answer:

potentiometer wire should be of high specific resistance so that even a comparable smaller length of the material allloy could suffice to give desired value of resistance ALso it must have low temperature coeefficient because it would be independent of the surrounding changes in temperature while taking the reading