The cavity resonators are used in the klystron amplifiers for
(a) Amplifying RF signals
(b) Amplifying microwave signals
(c) Attenuating RF signals
(d) Attenuating microwave signals
The question was asked by my school principal while I was bunking the class.
The question is from Waveguide Current and Excitation topic in section Waveguides of Electromagnetic Theory
Select the correct answer from above options
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