Essay On Thomson Effect

Abstract
Thermoelectric effect has been a topic of concern for the engineers and scientists since 1820 (100 years before world wars). In this term I studied the research of great scientists like Thomas Johann Seebeck, Gustav Magnus, Jean Charles Athanase Peltier, William Thomson (Lord Kelvin) in the area of Thermoelectric Effect. This term paper gives the shorthand knowledge about Thermoelectric Effect to an individual. In this research paper I firstly studied about the Thermoelectric effect and the effects which come under it, like- Seebeck Effect, Peltier Effect, and Thomson Effect, and all their important terms, history and applications. The part of major concern in this paper is the applications of Thermoelectric Effect in different time

One say that a circuit composed of single material which temperature difference along its length would generate or absorb the heat when electric current flows through it, is known as Thomson effect.
History of Thomson Effect
A comprehensive explanation of Seebeck and Peltier effects and explanation of their inter-relationship was issued by William Thomson. Both Peltier and Seebeck are related through Thermodynamics. The third thermoelectric effect (Thomson Effect) got predicted by the derivation of thermodynamics. In this, both current and temperature gradients are directly proportional to heat. The proportionality constant is known as Thomson effect. Thomson Relations
In 1854, a relationship between Thomson coefficient, Peltier coefficient and Seebeck coefficient was found by Lord Kelvin.
First Relation is, K=∂IT/∂T-S
Where, T is absolute temperature, K is Thomson coefficient, IT is Peltier coefficient and S is Seebeck coefficient.
This show the Thomson effect is continuous form of Peltier effect.
Second Relation is,
IT= TS
This expresses the connection between Seebeck and Peltier effects.
By this, First one becomes
K=T