JEE PHYSICS MCQ: CURRENT ELECTRICITY

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Application +4 | -1

One junction of a certain thermoelectric couple is at a fixed temperature

{T_r}

and the other junction is at temperature

T

. The thermo-electromotive force for this is expressed by

E = k\left( {T - {T_r}} \right)\,\,\left[ {{T_0} - \frac{1}{2}\left( {T + {T_r}} \right)} \right]

. At temperature

T = \frac{1}{2}{T_0}

, the thermoelectric power is

View answer and explanation

Correct option: A

\frac{1}{2}\,\,k\,{T_0}

Option A (

\frac{1}{2}\\ k\\,{T_0}

) is correct because it is the result of differentiating the given electromotive force equation with respect to temperature and then substituting the given temperature value.

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