MIT Physics Demo -- Galvanometer Principle
Two large coils of wire ("Helmoholz coils") are connected to 125V DC power, and produce a uniform magnetic field between the coils. A separate coil is suspended with this field. Switching the polarity of the DC current in the inner coil causes it to rotate in opposite directions.
This principle is used by devices called galvanometers to measure electric current.
Added over 3 years ago | 00:00:54 | 5397 views
Added 7 years ago | 00:00:46 | 48106 views
Added over 7 years ago | 00:01:26 | 50369 views
Added over 3 years ago | 00:01:20 | 5234 views
Added over 3 years ago | 00:01:51 | 5777 views
Added 3 years ago | 00:00:52 | 5801 views