Thomsons effect is the combined effect of Seeback effect and Peltier effect. Justify your answer.
Answers
Answer:
Explanation:
When two dissimilar conductors are joined by their two end that is known as thermo-couple. (Conductors should be different in thermo-couple and joints will be known as junction).
Seeback effect:
If two junctions of thermo-couple are placed at different temperature, then an emf will be produced in thermo-couple which will be proportional to the temperature difference.
Peltier Effect:
It is reverse of Seeback effect. According to this, when an electric current is passed through thermo-couple ,heat is evolved at one junction and absorbed at the other end i.e one end become hot while other become cold. The absorption and evolution of heat depends on the direction of flow of current.
Thomson Effect:
The major difference between Thomson effect and other two is that in Thomson effect we deal with only single metallic rod and not with thermo-couple as in Peltier effect and Seebeck effect.
According to this effect, if a conductor has placed in varying temperature along its length and current is passed through it then it will absorb or evolve heat. Absorbing or evolving heat will depend on direction of current.
Also, there are positive and negative Thomson effect but I’m not mentioning in this answer as I want this as simple as possible.