> Q. Thermo e.m.f. $E$ volt of certain thermo-couple varies with temperature $theta$ of a hot junction as $E=40,theta-frac{theta^2}{20}$ The neutral temperature of the thermo-couple is – LIVE ANSWER TODAY

Q. Thermo e.m.f. $E$ volt of certain thermo-couple varies with temperature $theta$ of a hot junction as $E=40,theta-frac{theta^2}{20}$ The neutral temperature of the thermo-couple is

In This post you will get answer of Q.
Thermo e.m.f. $E$ volt of certain thermo-couple varies with temperature $theta$ of a hot junction as
$E=40,theta-frac{theta^2}{20}$
The neutral temperature of the thermo-couple is

Solution:

When $theta = theta_n , frac{dE}{dtheta} $ = 0

$therefore$ $40 – frac{1}{10} theta_n $ = 0 or $frac{1}{10}theta_n$ = 40

or $theta_n$ = 400$^circ$C

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