In a circuit breaker the contact space is ionised by what?
A)Field emission from the contact surface.
B)Thermal emission from the contact surface.
C)Thermal ionisation of gas.
D)All of above.

Question

Quizplus · Accepted Answer

The contact space in a circuit breaker is ionised primarily by the thermal ionisation of gas, which occurs when the gas is heated to a high temperature, causing it to ionise and become conductive.

In a Circuit Breaker the Contact Space Is Ionised by What