When the temperature changes the resistivity of the materials of the electric wires also changes. The alterations can be calculated by the formulas given below and the constants of the used materials.
Formula 1
Rt1 = Rt2 x [ 1 + a (t2 - t1) ]
Where:
Rt1 is the final resistance in ohm (Ω)
Rt2 is the initial resistance in ohm (Ω)
t2 is the final temperature in Celsius or Kelvin
t1 is the initial temperature in Celsius or Kelvin
a is the temperature coefficient of the used material
