Question

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

Answer 1

$R=R_0(1+at+bt^2),$

$a=3.8\cdot 10^{-4},$

$b=3\cdot 10^{-6},$

$R(70)=1.041R_0.$