The temperature at which thermal electric power of a thermo couple becomes zero is called
A
Inversion temperature
B
Neutral temperature
C
Junction temperature
D
Null temperature
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B
Neutral temperature
b (b) Thermo-electric power $P = \frac{{dE}}{{d\theta }};$ at $t_n$, $E$ $\to$ maximum. So $P$ $\to$ zero.
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