AIPMT MAINS2010Physics-Thermodynamics
AIPMT MAINS 2010 Physics Thermoelectric effects MCQ Question
Type: MCQ-numerical-Medium-Class 11
The thermo e.m.f. E in volts of a certain thermo-couple is found to vary with temperature difference θ in °C between the two junctions according to the relation E =³⁰⁰⁻ θ²/15. The neutral temperature for the thermo-couple will be
A
450°C
B
400°C
C
225°C
D
300°C
Correct Answer
Option C
Detailed Explanation
The neutral temperature is found by setting the derivative of E with respect to θ to zero. Solving gives θ = 225°C.
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