SSC MTS EXAM

Detailed explanation-1: -Thermal energy given to the charge carriers overcome the work function of the metal and thus flow of charge carriers takes place from the metal surface. These charge carriers can be electrons and ions. So, process of the emission of electrons from the hot metal surface is called as thermionic emission.

Detailed explanation-2: -Thermionic emission (archaically known as the Edison effect) is the flow of charged particles called thermions from a charged metal or a charged metal oxide surface, caused by thermal vibrational energy overcoming the electrostatic forces holding electrons to the surface.

Detailed explanation-3: -Thermionic emission is a process where thermal energy causes a broadening of the electron distribution such that some higher energy electrons will emit into vacuum.

Detailed explanation-4: -The emission of electrons from a metal surface when heat energy is imparted to it is called the thermionic emission. Thermionic emission is the thermally induced flow of charge carriers from a surface or over a potential-energy barrier.