Question

calculate the temperature on the platinum scale corresponding to 400 degree celsius on a thermometer

Answer 1

The temperature (in ohms) on the platinum thermometer scale:

$$R(T)=R_0(1+a-\alpha T-\beta T^2),$$

where

R₀ - resistance at 0°C,

$a$ - constant

$\alpha$ - constant

β - constant.

Since the constants are not given, the resistance at 400°C can be found as

$$R(400)=R_0(1+a-400\alpha-160000\beta).$$

Plug in the missing values to get the answer.