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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
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B
Joule effect
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C
Petlier effect
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D
Thomson effect
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Solution

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.

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