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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
- If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits
- In forward biasing of the p-n junction
- The horizontal range of a projectile is 4√3 times the maximum height achieved
- An ideal heat engine works between temperature T₁=500 K and T₂=375 K.
- A sphere of 4cm radius is suspended with in a hollow sphere of 6cm radius. If the inner
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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