| 1. | A reflex klystron functions as a grid ? | |
|
microwave oscillator
|
||
|
microwave amplifier
|
||
|
high gain cavity
|
||
|
amplifier as well as an oscillator
|
||
View Answer
Discuss in Forum
Report Question| 2. | Microwave resonators are used in ? | |
|
microwave narrow band amplifier
|
||
|
microwave frequency metres
|
||
|
microwave oscillators
|
||
|
all of the above
|
||
| 3. | Which of the following devices uses a helix ? | |
|
TWT
|
||
|
Klystron amplifier
|
||
|
Klystron oscillator
|
||
|
Both (a) and (b)
|
||
| 4. | The fabrication of microstrip line is done by ? | |
|
printed circuit technique
|
||
|
photo etching
|
||
|
cladding
|
||
|
oxidation
|
||
| 5. | Which of the following devices uses a slow wave structure ? | |
|
Klystron two cavity amplifier
|
||
|
TWT
|
||
|
Klystron multicavity amplifier
|
||
|
Reflex klystron oscillator
|
||
| 6. | The kinetic energy of beam remains unchanged in the interaction between an electron beam and an RF wave in a ? | |
|
travelling-wave tube
|
||
|
gyrotron
|
||
|
multi-cavity klystron
|
||
|
crossed-field amplifier
|
||
| 7. | In cavity magnetron, strapping is used to ? | |
|
prevent cathode back heating
|
||
|
ensure bunching
|
||
|
prevent mode jumping
|
||
|
improve the phase focussing effect
|
||
| 8. | The secondary cavity in a two cavity klystron is called the ? | |
|
buncher cavity
|
||
|
velocity modulation cavity
|
||
|
catcher cavity
|
||
|
None of the above
|
||
| 9. | Phase focussing, which leads to bunching of electrons takes place in which one of the following ? | |
|
Magnetron
|
||
|
TWT
|
||
|
Double resonator Klystron
|
||
|
Reflex Klystron
|
||
| 10. | The Gunn diode is made from ? | |
|
Gallium Arsenide
|
||
|
Silicon
|
||
|
Selenium
|
||
|
Germanium
|
||