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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 body cools in 7 minute from 60⁰C to 40⁰C. What time, in minute does it take to cool
- The wave described by y = 0.25 sin (10 2πx – 2πt), where x and y are in meters
- A body is under stress F and has Young’s modulus Y, then the energy
- A beam of light of wavelength 590 nm is focussed by a converging lens of diameter
- The pressure at the bottom of a tank containing a liquid does not depend on
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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