In a circuit breaker the contact space is ionised by what?

Q.  In a circuit breaker the contact space is ionised by what?
- Published on 17 Nov 15

a. Field emission from the contact surface.
b. Thermal emission from the contact surface.
c. Thermal ionisation of gas.
d. All of above.

ANSWER: Thermal ionisation of gas.

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    Discussion

  • Ruchita Chandrakant Dighe   -Posted on 12 Oct 20
    Answer should be all the above
  • S.shinde107021@gmail.com   -Posted on 30 Aug 18
    Answer is B ..c jb gupta page 517 and q no 93

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