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Question
The heat developed in a system is proportional to the current through it.
Options
It cannot be Thomson heat
It cannot be Peltier heat
It cannot be Joule heat
It can be any of the three heats mentioned above
Solution
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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