MCQ
A thermo couple develops $200\  \mu V$ between $0^{\circ} C$ and $100^{\circ} C$. If it develops $64\  \mu V$ and $76\  \mu V$ respectively between $\left(0^{\circ} C -32^{\circ} C \right)$ and $\left(32^{\circ} C -70^{\circ} C \right)$ then what will be the thermo emf it develops between $70^{\circ} C$ and $100^{\circ} C$
  • A
    $65\  \mu V$
  • $60\  \mu V$
  • C
    $55 \ \mu V$
  • D
    $50 \ \mu V$

Answer

Correct option: B.
$60\  \mu V$
The thermo emf develop is given by
$e_0^{100}=e_0^{32}+e_{32}^{70}+e_{70}^{100} \Rightarrow 200=64+76+e_{70}^{100}=60\  \mu V$
Thus $60 \mu V$ is the required thermo emf.

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