Barkhausen Effect
Click above to see movie
PIRA Classification: 5G20.10
Description: A metal core (iron, steel, or copper wire ) is inserted
into a coil of wire connected to the lecture hall sound system. When a bar
magnet is brought near, crackling can be heard. This sound is that of the
domains flipping (with the steel or iron). Nothing is heard with the copper
or empty coil.
Special Instructions: None
Ideally For: Phys 1102, 1202, 1302, 1402
Condition: Good
Setup time: 2 minutes
Safety Issues: None