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Heating and Chemical Effect of Current — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsHeating and Chemical Effect of Current1 Mark
MCQ
When a current of 1 ampere is passed through a conductor whose ends are maintained at temperature difference of $1^{\circ} C$, the amount of heat evolved or absorbed is called
  • A
    Peltier coefficient
  • ✓
    Thomson coefficient
  • C
    Thermoelectic power
  • D
    Thermo e.m.f.
✓

Answer

Correct option: B.
Thomson coefficient
$H=\sigma i t \Delta \theta \Rightarrow$ If $i=1 A, \Delta \theta=1^{\circ} \mathrm{C}, t=1 \sec$ then $H=\sigma$.

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