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.
You need to log in, in order to post comments.
Added over 7 years ago | 00:02:54 | 49216 views
Added over 6 years ago | 00:02:33 | 47273 views
Added 8 years ago | 00:00:53 | 49737 views
Added 8 years ago | 00:00:37 | 39108 views
Added over 8 years ago | 00:01:11 | 45814 views
Added 7 years ago | 00:01:26 | 45100 views