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Electrical Engineering MCQ Question & Answer in PDF Download

Q.

In a circuit breaker the contact space is ionized by

  • AField emission from the contact surface 
  • BThermal emission from the contact surface
  • CThermal ionization of gas 
  • DAny of the above 
Correct Answer : (B)

Thermal emission from the contact surface
Hints :

In a circuit breaker the contact space is ionized by thermal emission from the contact surface.

Electrical Engineering MCQ Question & Answer in PDF Download
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