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In a TWT the axial component of electric field advances along the tube | |
A. | at a velocity that is almost equal to speed of light [Wrong Answer] |
B. | at a velocity that is a small fraction of speed of light [Correct Answer] |
C. | at a velocity that is about 50% of speed of light [Wrong Answer] |
D. | at a velocity that may be even more than speed of light [Wrong Answer] |