A thermocouple is formed of two different wires which are connected at one end with one another.a voltage is produced when the junction is heated or cooled.
Peltier coefficient is defined as the quantity of heat energy produced at the junction of thermocouple when 1 ampere current flows through it for 1 second .
Its is measured in volts and is denoted by 𝝅
Let i be the current flowing through the junction for t seconds
Then heat evolved or absorbed at the junction is
H=𝝅 i t
