Massachusetts Institute of Technology
Sign in | Create Account

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.

Comments (1)

That was cool. Hannah

Posted over 5 years by Anonymous User

You need to log in, in order to post comments. If you don’t have an account yet, sign up now!

July 08, 2008 10:38
Creative Commons Attribution-NonCommercial (What is this?)
Additional Files

48094 times

More from MIT Department of Physics Technical Services Group

Physics Demo -- Lenz's Law

Physics Demo -- Lenz's Law

Added 6 years ago | 00:00:29 | 47122 views

Bell Labs Wave Machine: Matched Impedance

Bell Labs Wave Machine: Matched Imp...

Added 3 years ago | 00:01:13 | 11194 views

MIT Physics Demo -- Conductivity of Ionized Water

MIT Physics Demo -- Conductivity of...

Added almost 6 years ago | 00:00:53 | 45271 views

Physics Demo -- Magnetic Motor

Physics Demo -- Magnetic Motor

Added 6 years ago | 00:01:29 | 67375 views

Fiber Optic Bundle

Fiber Optic Bundle

Added almost 2 years ago | 00:01:20 | 3607 views

Bell Labs Wave Machine: Superposition

Bell Labs Wave Machine: Superposition

Added 3 years ago | 00:00:34 | 10903 views