Question

In consumable welding process, primary mode of electron emission is by

 thermionic emission

 field emission

 melting

 condensation

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Answer 1

Thermionic emission

It is the thermally induced / initiated flow of charge bearers from a surface or over a P . E . barrier. This happens in light of the fact that the thermal energy given to the bearer conquers the work function of the material. The charge bearers can be comprised of electrons or ions. After outflow or its emission, a charge that is equivalent in magnitude and inverse in sign to the total charge transmitted is at first abandoned in the discharging region.

Answer 2

Option A

Thermionic Emission

Thermionic Emission

The process of emission of electron when a metal is heated is known as Thermionic Emission.

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