Physics (Essay) Paper 2 WASSCE (PC 2ND), 2022

Question 2

 

List three applications of thermionic emission.

Observation

 

Applications of thermionic emission

  • X-ray production  
  • Cathode ray tube(C.R.T.) / T.V.
  • Gas discharge tube
  • Neon lamps
  • Transistors for electronics
  • Electron gun for scientific instruments
  • Vacuum tube