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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 dip needle vibrates in a vertical plane perpendicular to magnetic meridian. The time
- A spring of spring constant 5 x 10³ N/m is stretched initially by 5 cm
- The acceleration due to gravity becomes (g/2) where g=acceleration due to gravity
- A particle moves along the x-axis from x=0 to x=5 m under the influence of a force
- A spring of spring constant 5 x 10³ Nm⁻¹ is streched intially by 5 cm from
Topics: Current Electricity (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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