Coefficient 80514

The resistance of a platinum wire at a temperature of 20°C is 20 Ω, and when heated to 500°C, it increases to 59 Ω. Determine the mean temperature coefficient of platinum

Correct answer:

α =  0.0041 1/K

Step-by-step explanation:

t1=20 °C R1=20 Ω t2=500 °C R2=59 Ω  R2= R1   (1 + α (t2t1))  α=t2t1R2/R11=5002059/201=0.0041 1/K



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