A coil of wire has a resistance of 37.300 Ω at 27.400 °C and 43.800 Ω at 52.000 °C. What is the temperature coefficient of resistivity?
Assuming the change of resistance with temperature is linear, then you just need to do a proportion:
The resistance changes by 43.8 - 37.3 = 6.5 ohms over a temperature difference of 52.0 - 27.4 = 24.6 deg C.
So the temperature coefficient of resistivity is 6.5/24.6 = 0.2462 ohms per degree C
Comments
Assuming the change of resistance with temperature is linear, then you just need to do a proportion:
The resistance changes by 43.8 - 37.3 = 6.5 ohms over a temperature difference of 52.0 - 27.4 = 24.6 deg C.
So the temperature coefficient of resistivity is 6.5/24.6 = 0.2462 ohms per degree C