Question

a copper wire has 100 ohms resistance at 300 kelvin and 50 ohms resistance at 0 kelvin. what is the value of alfa?

Answer 1

Answer:

Formula : Rt = R0 ( 1+ α T)

Answer 2

0.004 per degree at 0 degrees.

Rt = R0 (1+(alpha 0 x the temperature change))

Where:

Rt is the resistance at the new temperature

R0 is the resistance at the old temperature (0 degrees in this question)

and alpha 0 is the temperature coefficient of resistance of the material (referenced to 0 degrees in this question)