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 almost 9 years ago | 00:01:10 | 49067 views
Added over 8 years ago | 00:07:38 | 55193 views
Added over 9 years ago | 00:02:00 | 67526 views
Added 9 years ago | 00:00:41 | 50472 views
Added over 9 years ago | 00:01:02 | 38819 views
Added over 9 years ago | 00:00:28 | 55431 views