5H30.10-Magnet and TV

Video: Watch this demo

Instructor’s video

Description: This demonstration shows what happens when you bring a magnet near a CRT.
The magnet bends the electron beam so the electrons no longer hit the correct phosphors on the screen,
which messes up the colors.

Equipment:

• Color Cathod Ray Tube (such as TV or monitor) that can be ruined
• Cow Magnet or Bar Magnet
• Electric Magnetizer

Setup Procedure:

1. Using the electric magnetizer, magnetize two bar magnets.
2. Tune the TV to either a white screen or a video feed.

Demonstration Procedure:

1. Bring the magnet near the screen and note the changes in color.

 
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