In this section of Electronic Devices and Circuits.It contain Gas Filled Tubes MCQs (Multiple Choice Questions Answers).All the MCQs (Multiple Choice Question Answers) requires in depth reading of Electronic Devices and Circuits Subject as the hardness level of MCQs have been kept to advance level.These Sets of Questions are very helpful in Preparing for various Competitive Exams and University level Exams.

This Section covers below lists of topics :

  1. Gas filled tubes MCQs.
  2. Cold cathod ,gas filled diode MCQs.
  3. Old cathod ,gas filled diode MCQs.
  4. Thyratron MCQs

Practice it now to sharpen your concept.

PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE

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1. Conduction in a cold cathode gas filled tube is started by

  • Natural sources
  • Thermionic emission
  • Both a and b
  • None of these

2. A cold cathode tube is usually used as a

  • Diode
  • Triode
  • Tetrode
  • Pentode

3. A gas fill cold cathode diode uses as a

  • Rectifier
  • Amplifier
  • Voltage regulating tube
  • None of these

4. In a gas filled tube, the gas used is

  • Neon
  • Argon
  • Helium
  • All of these

5. A cold cathode gas filled diode is also known as

  • Phanotron
  • Uthyratron
  • Glow tube
  • Grid glow tube

6. The anode cathode, voltage at which a gas filled diode fires is known as

  • Ionization voltage
  • Critical voltage
  • Deionization voltage
  • Normal voltage

7. A cold cathode gas filled diode emits light during

  • Glow discharge region
  • Arc discharge region
  • Townsend discharge region
  • None of these

8. A thyratron can be used as a controller rectifier

  • By changing the anode current
  • By changing the grid voltage
  • By using different gas pressure in the tube
  • All of these

9. The critical grid voltage of a thyrotron is defined as the negative grid voltage, for a given plate potential at which ionization of the gas starts

  • True
  • False

10. A thyratron can not be used as

  • Rectifier
  • Switch
  • Amplifier
  • None of these
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