Question

The slope of thermo electric curve at any point on it gives corresponding value of :

• A. thermo emf
• B. thermoelectric power
• C. neutral temperature
• D. Absolute temperature

Answer 1

The correct option is B thermoelectric power

Thermoelectric power is defined as the rate of change of thermoelectric emf with temperature and is also known as seebeck coefficient.

The thermoelectric power is determined by the slope of the thermo electric curve

We express it in volt per degree Celsius.

$V=\alpha t+\frac{1}{2}\beta t^2$

Therefore,
Thermoelectric power = $\frac{dV}{dt}=\frac{d}{dt}(\alpha t+\beta t^2)$

Further simplifying we have,

$S=\frac{dV}{dt}=(\alpha +\beta t)$