Gmdss_e3 : Element 3 - Question 564 - Total Questions: 605 | « Previous Question | |
| The permanent magnetic field that surrounds a traveling-wave tube (TWT) is intended to: | |
| A | Provide a means of coupling. |
| B | Prevent the electron beam from spreading. |
| C | Prevent oscillations. |
| D | Prevent spurious oscillations. |
