Navigate

The rate of increase of thermo-e.m.f. with temperature at the neutral temperature

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

AIPMT2011
admin:

Related Questions

  1. The kinetic energy needed to project a body of mass m from the surface of earth
  2. The wing span of an aeroplane is 20 m. It is flying in a field where the vertical
  3. Two radioactive materials X₁ and X₂ have decay constants 5λ and λ respectively
  4. A long wire carrying a steady current is bent into a circular loop of one turn.
  5. If the alternating current I=I₁ cos⁡ωt+I₂ sin⁡ωt, then the rms current is given by