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The rate of increase of thermo-emf with ...

The rate of increase of thermo-emf with temperature at the neutral temperature of a thermocouple

A

is zero

B

depends upon the choice of the two material the thermocouple

C

is negative

D

is positive

Text Solution

Verified by Experts

The correct Answer is:
A
(a) We have `e = at + bt^(2)`
`(de)/(dt) = a + 2 bt`
Natural temperature `R_(n) = - (a)/(2 b)`
At neutral temperature `(de)/(dt) = 0`
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