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. A particle moving in a straight line with uniform acceleration is observed
  2. To draw the maximum current from a combination of cells, how should be the cells
  3. The work done in which of the following processes is zero?
  4. Light of wavelength 500 nm is incident on a metal with work function 2.28 eV.
  5. A Si and a Ge diode has identical physical dimensions. The bandgap in Si is larger