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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 α-particle of energy 5 MeV is scattered through 180⁰ by a fixed uranium nucleus.
- In India, electricity is supplied for domestic use at 200V. It is supplied at 110 V
- A p-n-p transistor is used in common emitter mode in an amplifier circuit.
- A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field
- Source S₁ is producing, 10¹⁵ photons per second of wavelength 5000Å
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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