183. In a two cavity klystron, the input cavity resonator is also known as
A. the velocity modulator
B. the catcher cavity
C. the buncher cavity
D. none of these
184. Bunching process can be graphically explained by a curve or diagram
A. of electron density vs. distance from input gap
B. called velocity diagram called Applegate diagram
C. of input resonator electrical field vs.electron density
D. none of these
185. Typical value of the overall efficiency of a two-cavity klystron is
A.80%
B.90%
C.10%
D.20%
186. Typical value of output circuit efficiency (i) of a two-cavity klystron is
A.60%
B.30%
C.90%
D. none of these
187. A reflex klystron is characterised by
A. a very high gain
B. only one cavity
C. a very high gain-brandwidth product
D. none of these
188. A reflex klystron
A. can be operated both as an amplifier and as an oscillator
B. is an oscillator
C. only is a high gain single cavity microwave amplifier
D. none of these
189. Pick the odd-man out
A. Reflex klystron
B. Travelling wave magnetron
C. Cyclotron-frequency magnetron
D. Negative resistance magnetron
Page 27 of 28