

McqMate
Q. |
The primary purpose of the helix in a traveling-wave tube is to |
A. | prevent the electron beam from spreading in the long tube |
B. | reduce the axial velocity of the rf field |
C. | ensure broadband operation |
D. | reduce the noise figure |
Answer» B. reduce the axial velocity of the rf field |
View all MCQs in
Radiation and Microwave TechniquesNo comments yet