For some applications, it is important that the value of a resistance not change
ID: 2089191 • Letter: F
Question
For some applications, it is important that the value of a resistance not change with temperature. For example, suppose you made a 6.90 komega resistor from a carbon resistor and a Nichrome wire-wound resistor connected together so the total resistance is the sum of their separate resistances. Part A: What value should the carbon resistor have (at 0 deg C ) so that the combination is temperature independent? Answer in Omega... Part B: What value should the Nichrome wire-wound resistor have (at 0 deg C ) so that the combination is temperature independent? Answer in Omega...Explanation / Answer
given
Rc+Rn =6900
Rc+Rn=Rco[1+ac*dT]+Rno[1+an*dT]
Rc+Rn=Rco+Rno+dT[ac*Rco+an*Rno]
for temperature to be independent