What happens when current is passed in an antimony-bismuth couple?
A
The junction becomes hot when current flows from antimony to bismuth
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B
The junction becomes hot when the current flows from bismuth to antimony
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C
Both junctions become hot
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D
Both junctions become cold
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Solution
The correct option is B
The junction becomes hot when the current flows from bismuth to antimony
Peltier effect:
The Peltier effect is the inverse of the Seebeck effect.
An electrical current passing through a junction joining various materials would release or absorb heat per unit duration at the junction to counterbalance or equalize the differential in chemical potential between the two components.
When a current passes from bismuth to antimony, the junction gets heated due to the Peltier effect.