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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
- For photoelectric emission from certain metal the cut-off frequency is v
- The energy of the em waves is of the order of 15 keV. To which part of the spectrum
- Electrons in the atom are held to the nucleus by
- An automobile engine develops 100 kW when rotating at a speed of 1800 rev/min
- The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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