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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
Related Questions: - The effective length of magnet is 31.4 cm and its pole strength is 0.8Am.
- The momentum of a photon of energy 1 MeV in kg m/s will be
- During an adiabatic process, the cube of the pressure is found to be inversely
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Topics: Current Electricity
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The effective length of magnet is 31.4 cm and its pole strength is 0.8Am.
- The momentum of a photon of energy 1 MeV in kg m/s will be
- During an adiabatic process, the cube of the pressure is found to be inversely
- A bar magnet of moment M and pole strength m is cut into parts of equal lengths.
- When a metallic surface is illuminated with radiation of wavelength λ,
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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