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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 mass m moving horizontally (along the x-axis) with velocity v collides and sticks
- A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof
- When an object is placed 40cm from a diverging lens, its virtual image is formed 20 cm
- Water falls from a height of 60m at the rate of 15 kg/s to operate a turbine
- A particle free to move along X-axis has potential energy given as U(X) =k(1-e⁻ˣ²)
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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