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Thermal and Chemical Effect of Current — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsThermal and Chemical Effect of Current1 Mark
MCQ
Consider the following statement regarding a thermocouple:
  1. The neutral temperature does not depend on the temperature of the cold junction.
  2. The inversion temperature does not depend on the temperature of the cold juhction.
  • A
    Both $A$ and $B$ are correct.
  • ✓
    $A$ is correct but a is wrong.
  • C
    $B$ is correct but $A$ is wrong.
  • D
    Both $A$ and $B$ are wrong.
✓

Answer

Correct option: B.
$A$ is correct but a is wrong.
At cold function:
$Q_n-Q_c=Q_i-Q_n$
where $\mathrm{Q}_{\mathrm{n}}$ Þ neutral temperture
$\mathrm{Q}_{\mathrm{i}}$ Þ inversion temperature
$\mathrm{Q}_{\mathrm{CÞ}}$ thermo-couple temperature.
$Þ$ The neutral temperature does not depend on the temperature of the cold function.
$Þ$ The inversion temperature does depend on the temperature of the cold function.

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