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The rate of increase of thermo-e.m.f. with temperature at the neutral temperature of a thermocouple
Options
(a) is positive
(b) is zero
(c) depends upon the choice of the two materials of the thermocouple
(d) is negative
Correct Answer:
is zero
Explanation:
We have, e = at + bt²
de/ dt = a + 2bt
At neutral temperature,
t = – a / 2b
de/ dt = 0
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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An inductor is connected to an a.c. source when compared to voltage,
- If longitudinal strain for a wire is 0.03 and its poisson’s ratio is 0.5
- A projectile is thrown in the upward direction making an angle of 60°with the horizontal
- A bucket full of water is revolved in a vertical circle of 2m
- A magnetic needle suspended parallel to a magnetic field requires √3J of work
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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