Question
Physics Question on Electromagnetic induction
Nichrome or Manganin is widely used in wire bound standard resistors because of their
A
temperature independent resistivity
B
very weakly temperature dependent resistivity
C
strong dependence of resistivity with temperature
D
mechanical strength
Answer
very weakly temperature dependent resistivity
Explanation
Solution
Temperature coefficient of resistance of alloys have small values. Hence, resistivity of alloys depends weakly on temperature. Nichrome and manganin both are alloys and their resistivity depends weakly on temperature. Hence, they are used in wire bound standard resistors.