Question

We use alloys for making standard resistors because they have 

(i) low temperature coefficient of resistivity and high specific resistance 

(ii) high temperature coefficient of resistivity and low specific resistance 

(iii) low temperature coefficient of resistivity and low specific resistance 

(iv) high temperature coefficient of resistivity and high specific resistance

Answer 1

Answer is (i) low temperature coefficient of resistivity and high specific resistance

Alloys have low temperature coefficient of resistivity and high specific resistance. If α = low , the value of ‘R’ with temperature will not change much and specific resistance is high then required length of the wire will be less.