Q. As the temperature of hot junction of a thermo-couple is increased (while cold junction is at constant temperature), the thermo $e.$m.f
A) Increases uniformly at constant rate
B) Increases slowly in the beginning and more rapidly at higher temperatures
C) Increases more rapidly in the beginning but less rapidly at higher temperatures
D) Is minimum at neutral temperature
Explanation
The correct answer is Option C: Increases more rapidly in the beginning but less rapidly at higher temperatures.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.