Monday 10 February 2014

Demonstrations and questions on electrons in electric or magnetic field

Demo 1 - Increasing deflection plates potential difference


Questions:
  • What do you notice about the electron beam when the deflection plates p.d. is increased?
  • Explain your answer to the previous question.

Demo 2 - Increasing accelerating potential  



Questions:
  • What do you notice about the electron beam when the accelerating p.d. is increased?
  • Explain your answer to the previous question.

Demo 3 - Electron beam in uniform magnetic field while accelerating potential is increased



Questions:
  • What do you notice about the electron beam in uniform when the accelerating potential is increased?
  • Explain your answer to the previous question.

Demo 4 - Electron in increasing magnetic field



Questions:
  • What do you notice about the electron beam in uniform field when magnetic flux density is increased?
  • Explain your answer to the previous question.

Demo 5 - Electrons enter the magnetic field not at right angle (Helical motion)


Questions:
  • What do you notice about the electron enter the magnetic field not at right angle?
  • Explain your answer to the previous question. The video below may help you.

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