Q. In circuit-breakers the contact space is ionized by (Solved)
1. Thermal ionization of gas
2. Thermal emission from surface of contacts
3. Field emission from the surface of contacts
4. Any of the above.
- d. Any of the above.
1. Thermal ionization of gas
2. Thermal emission from surface of contacts
3. Field emission from the surface of contacts
4. Any of the above.