This demonstration emphasizes the magnetic field produced by the motion of charged particles. A wire capable of carrying a high current is connected directly to a 12 V car battery through a high capacity knife switch. The switch is thrown closed for a short time and the effect of the current on a nearby compass needle is observed. (It is important to immediately reopen the switch to prevent overheating.)

Equipment:
- Car battery (12 V)
- High current wire
- Knife switch
- Connecting wires
- Magnetic Compass

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This video is part of the project "Videos of Physics Demonstrations", which is created by Dr. Galli and Dr. Amiri of Physics Department, Weber State University. To access the full library of the videos, please visit this link: [ Ссылка ]

Links to University and Department:
Weber State University Homepage: [ Ссылка ]
WSU Physics Department: [ Ссылка ]

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