Thermionic Emission MCQs Quiz Worksheet PDF Book Download

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MCQ on Thermionic Emission PDF Book Download

MCQ: Process of emission of electrons from hot metal surfaces is called

  1. plastic emission
  2. thermionic emission
  3. static emission
  4. current emission

B

MCQ: Process of emission of electrons from hot metal surface is called

  1. electronic emission
  2. thermionic emission
  3. electron capture
  4. proton loss

B

MCQ: Particles emitted from hot cathode surface are

  1. negative ions
  2. positive ions
  3. protons
  4. electrons

D

MCQ: Cathode rays carry

  1. positive charge
  2. neutral
  3. negative charge
  4. positrons

C

MCQ: At room temperature, electron cannot escape metal surface due to

  1. attractive forces of nucleus
  2. repulsive forces of electrons
  3. repulsive forces of nucleus
  4. pulling force of protons

A