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.