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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
- When an electron beam passes through an electric field they gain kinetic energy.
- A particle of masses m is thrown upwards from the surface of the earth, with a velocity u
- A stone tied to the end of a string of 1 m long is whirled in a horizontal circle
- The drive shaft of an automobile rotates at 3600 rpm and transmits 80 HP
- A beam of cathode rays is subjected to crossed Electric (E) and Magnetic fields (B)
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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