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 5 years ago | 00:02:51 | 44532 views
Added almost 4 years ago | 00:01:11 | 19511 views
Added 6 years ago | 00:01:11 | 50989 views
Added over 5 years ago | 00:02:25 | 36265 views
Added 6 years ago | 00:00:49 | 37968 views
Added 5 years ago | 00:03:00 | 41704 views