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
A08
May 30, 2018

The modified equation for measuring an unknown temperature #theta# with Resistance Temperature Detector using Linear Approximation is

#theta=(R_theta-R_0)/(R_100-R_0)xx100^@C#
where #R_0# is resistance measured at the ice point, #R_100# is resistance measured at steam point and #R_theta# is resistance measured at unknown temperature.

Inserting given values we get

#theta=(10-0.5)/(55-0.5)xx100^@C#
#=>theta=17.4^@C#

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