Mcqs of Thyratron and gas-filled tube of the 3rd chapter which are most important and usually this type of Mcqs of thyratron comes in job tests not all of them but 2 or 3 from this post. these Mcqs of thyratron are prepared for the learners who are now trying to get a job.
2. ………resistance of gas-filled tube has before ionization
(i) very high (ii) small (iii) very small (iv) zero
3. The (peak inverse voltage) PIV of a hot cathode gas diode is …….. the equivalent vacuum diode.
(i) the same as that of
(ii) more than that of
(iii) less than that of
(iv) none of the above
4. The anode-to-cathode potential of a gas filled tube at which gas deionizes and stops current flowing is called ……..potential.
(i) extinction (ii) striking (iii) ionising (iv) none of the above
5. A thyratron can be used as ……..
(i) an oscillator (ii) an amplifier (iii) a controlled switch (iv) none of the above
6. The gas-filled tube internal resistance is …….. that of a vacuum tube.
(i) the same as (ii) more than (iii) less than (iv) none of the above
7. A cold cathode tube is normally used as a ………..
(i) diode (ii) triode (iii) tetrode (iv) pentode
8. Conduction in a cold cathode tube is begins by ……..
(i) thermionic emission (ii) secondary emission
(iii) natural sources (iv) none of the above
9. The cathode heating of thermionic gas diode requires time is…….. that of a vacuum diode.
(i) the same as (ii) much more than
(iii) much less than (iv) none of the above
10. The solid state equivalent of thyratron is ……..
(i) FET (ii) transistor
(iii) SCR (iv) crystal diode
11. The solid state equivalent of cold cathode diode is ………
(i) zener diode (ii) crystal diode
(iii) LED (iv) transistor
12. The gas-filled tube noise is …….. that in a vacuum tube.
(i) the same as (ii) more than
(iii) less than (iv) none of the above
13. The ionization potential in a gas diode depends upon ……..
(i) plate current (ii) cathode construction
(iii) size of the tube (iv) type and pressure of the gas
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