A) Joule effect
B) Seebeck effect
C) Peltier effect
D) Thermionic
Correct Answer: C
Solution :
As refrigeration is the process of pumping heat energy out of an insulated chamber in order to reduce the temperature of the chamber below that of the surrounding air. Thermoelectric refrigeration uses a principle called the peltier effect to pump heat electronically. According to this effect when electric current is applied across the junction of two dissimilar metals, heat is removed from one of the metals and tranferred to the other. On the other hand Seeback is the direct conversion of heat differentials to electric voltage and vice-versa. Thermionic effect is the flow of electron from a metal caused by thermal vibrational energy and Joule's law is a physical law expressing the relationship between heat generated by an the current flowing in a conductor.
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