Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12

# The Heat Developed in a System is Proportional to the Current Through It. - Physics

MCQ

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.

Concept: Electrical Resistivity and Conductivity
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#### APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 11 Thermal and Chemical Effects of Current
MCQ | Q 4 | Page 218