The temperature of the hot junction of a ther | vedclass

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(D) For a thermocouple, the thermoelectric power $P$ is directly proportional to the temperature difference $	heta$ between the hot and cold junction

Vedclass · Accepted Answer

$25$

Vedclass · Answer

(D) For a thermocouple, the thermoelectric power $P$ is directly proportional to the temperature difference $	heta$ between the hot and cold junctions, assuming the cold junction temperature remains constant.$P \propto 	heta$Given the initial temperature $	heta_1 = 80\,^{\circ}C$ and final temperature $	heta_2 = 100\,^{\circ}C$.The percentage change in thermoelectric power is given by:$	ext{Percentage change} = \frac{P_2 - P_1}{P_1} 	imes 100$Substituting the proportionality $P \propto 	heta$:$	ext{Percentage change} = \frac{	heta_2 - 	heta_1}{	heta_1} 	imes 100$$	ext{Percentage change} = \frac{100 - 80}{80} 	imes 100$$	ext{Percentage change} = \frac{20}{80} 	imes 100 = \frac{1}{4} 	imes 100 = 25\,\%$

$X$	$1$	$2$	$3$	$4$	$5$
$P(X=x)$	$k$	$2k$	$3k$	$2k$	$k$

The temperature of the hot junction of a thermocouple changes from $80\,^{\circ}C$ to $100\,^{\circ}C$. The percentage change in thermoelectric power is ............... $\%$.

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