Question

When current is passed through a junction of two dissimilar metals, heat is evolved or absorbed at the junction. This process is called

• A. Seebeck effect
• B. Joule effect
• C. Petlier effect
• D. Thomson effect

Answer 1

The correct option is C Petlier effect

Seebeck effect - if two junctions of a thermocouple are kept at different temperatures, an electric current will be induced in the loop.
Peltier effect- the cooling of one junction and the heating of the other when electric current is maintained in a circuit of material consisting of two dissimilar conductors and it is called Peltier effect.
Joule effect - this is the process by which the passage of an electric current through conductor releases heat.
Thomson effect - if two sections of a conductor are at different temperatures then emf is developed between these two sections.