- #1
Spoonerz
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Homework Statement
A platinum wire is originally at 15 degree Celcius. Find the required temperature to increase its resistance by 3%.
Homework Equations
R = Ro * [1 + 'a' * (T-To)]
Ro is initial resistance. To is initial temperature.
'Temperature Coefficient' 'a' of platinum at room temperature 20 degree celcius is 3.9 * 10^-3
The Attempt at a Solution
I don't have an initial resistance to start off with. But I do have the initial temperature and the room temperature, To = 15 and T = 20 degree Celcius.
Solving for Temperature T = ('a'To + R/Ro) / 'a'
But I don't have any reference resistance to begin with, how do I solve this?