Questions
The thermo e.m.f. of a thermocouple varies with the temperature of the hot junction as where the ratio (a / b) is 700°C. If the cold junction is kept at 0°C, then the neutral temperature is
detailed solution
Correct option is B
Given that, E =aθ-bθ2∴ dEdθ=a-2bθneutral temperature θn=dEdθ=0∴ a-2bθn=0 or θn=(a/2b)∘C∴ θn=7002=350∘CTalk to our academic expert!
Similar Questions
Two thermometers are constructed in the same way except that, one has a spherical bulb and the other a cylindrical bulb. Which one will respond quicker to temperature change ?
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