How is the initiation of electric arc at the instant of contact separation caused?
A. Thermionic emission of electrons.
B. Field emission of electrons.
C. Both (a) and (b)
D. None of these.
Answer:B
How is the initiation of electric arc at the instant of contact separation caused?
A. Thermionic emission of electrons. B. Field emission of electrons. C. Both (a) and (b) D. None of these.