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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
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A 1Ω resistance in series with an ammeter is balanced by 75 cm of potentiometer wire
- If a full wave rectifier circuit is operating from 50 Hz mains, the fundamental
- A cricketer can throw a ball to a maximum horizontal distance of 100 m. With the same
- Photoelectric emision occurs only when the incident light has more than a certain minimum
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Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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