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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
The heat developed in a system is proportional to the current through it:
  • A
    It cannot be Thomson heat.
  • B
    It cannot be Peltier heat.
  • ✓
    It cannot be Joule heat.
  • D
    It can be any of the three heats mentioned above.
✓

Answer

Correct option: C.
It cannot be Joule heat.
Joule heat is directly proportional to the square of the current passing through the resistor. Peltier heat is directly proportional to the current passing through the junction. Thomson heat is also directly proportional to the current passing through the section of the wire. Thus, the heat developed can be either Thomson heat or Peltier heat. But it cannot be Joule heat.

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