In circuit-breakers the contact space is ionized by
A)Thermal ionization of gas
B)Thermal emission from surface of contacts
C)Field emission from the surface of contacts
D)Any of the above.

Question

Quizplus · Accepted Answer

Circuit breakers can utilize thermal ionization of gas, thermal emission from the surface of contacts, or field emission from the surface of contacts to ionize the contact space. These mechanisms help in establishing a conductive path for the arc, facilitating the interruption of current flow.

In Circuit-Breakers the Contact Space Is Ionized by