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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 linear aperture whose width is 0.02 cm is placed immediately in front of a lens
- In case of linearly polarised light, the magnitude of the electric field vector
- which of the following can not be emitted by radioactive substances during their decay?
- A stone falls freely under gravity. It covers distances h1, h2 and h3 in the first 5 secs
- In Young’s double slit experiment, the wavelength of the light used is doubled
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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