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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
- A 220 volts input is supplied to a transformer. The output circuit draws
- For the radioactive nuclei that undergo either α or β decay, which one
- A total charge of 5µC is distributed uniformly on the surface of the thin walled
- An open pipe resonates with a tuning fork of frequency 500 Hz. It is observed
- The maximum and minimum intensities of two sources is 4:1. The ratio of amplitude is
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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