What phenomenon describes the transfer of electrons when two dissimilar metals are heated together?

The transfer of electrons when two dissimilar metals are heated together is accurately described by thermoelectricity. This phenomenon occurs due to the Seebeck effect, where a voltage (or electromotive force) is generated when there is a temperature difference between two different conductors. When these metals are joined and subjected to heat, the difference in their electronic properties and the movement of charge carriers result in an electric current.

Thermoelectricity plays a critical role in various applications, including thermoelectric generators and cooling systems, where converting heat into electrical energy is essential. Understanding thermoelectricity helps in the manipulation and use of heat in electrical applications in lineman work and related fields.