Question 2.13: A thermocouple with test junction at t°C on gas thermometer ...

Engineering Thermodynamics

A thermocouple with test junction at t°C on gas thermometer scale and reference junction at ice point gives the e.m.f. as

$e=0.20 t-5 \times 10^{-4} t^2$ mV.

The millivoltmeter is calibrated at ice and steam points. What will be the reading on this thermometer where the gas thermometer reads 70°C ?

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