Thermionic Emission Multiple Choice Questions (MCQ) PDF Download

MCQ 1: The process of emission of electrons from the hot metal surfaces is called

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

MCQ 2: The process of emission of electrons from hot metal surface is called

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

MCQ 3: The particles emitted from hot cathode surface are

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

MCQ 4: The cathode rays carry

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

MCQ 5: At room temperature, the 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