What is the temperature of a body if the resistance of a resistance thermometer is 0.5 ohms at 0 degree celsius, 55 ohms at 100degree celsius and 10 ohms at the temperature of the body?
1 Answer
May 30, 2018
The modified equation for measuring an unknown temperature
theta=(R_theta-R_0)/(R_100-R_0)xx100^@Cθ=Rθ−R0R100−R0×100∘C
whereR_0R0 is resistance measured at the ice point,R_100R100 is resistance measured at steam point andR_thetaRθ is resistance measured at unknown temperature.
Inserting given values we get
theta=(10-0.5)/(55-0.5)xx100^@Cθ=10−0.555−0.5×100∘C
=>theta=17.4^@C⇒θ=17.4∘C