problem 1: Compare the multi-cavity klystron, reflex klystron, magnetron and Traveling wave tube on the basis of their:

a) Basic construction
b) Operation
c) Applications

problem 2: Describe how the oscillations are sustained in the cavity magnetron with appropriate sketches supposing that the mode oscillations already exist.

problem 3: What are the different UHF limitations of vacuum tubes that limit their use at high frequencies? describe each of these in detail and propose remedial measures.

problem 4: Differentiate between velocity modulation and current modulation.

problem 5: What do you mean by Hull cut off field?

problem 6: What is the phase focusing effect in the magnetron?

problem 7: What do you mean by slow wave structure and why is it required?

problem 8: What are reentrant cavities?

problem 9: What is the main purpose of strapping in the magnetron?

problem 10: What do you mean by electron bunching? How does it take place? Why it is also termed as intensity modulation?