14 The resistance ofa wire is given by
R= Roll+at+Bt?) PROBLEMS where is
the temperature in degrees Celsius
measured on the ideal gas scale and so
Ro is the resistance at the ice point. The
constants G and B are 3.8 x 10-%K and-
3.0x 106K respectively: Calculate the
tempera-ture on the resistance scale at
a temperature of 70*C on the ideal gas
Scale
"R=R_0(1+at+bt^2),"
"a=3.8\\cdot 10^{-4},"
"b=3\\cdot 10^{-6},"
"R(70)=1.041R_0."
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