Massachusetts Institute of Technology
Sign in Create Account

Physics Demo -- Lenz's Law

Two bar magnets of the same size are dropped through an aluminum tube and a glass tube. The magnet dropped in the glass tube falls at the normal rate of acceleration due to gravity, but the magnet falling through the metal tube is slowed.

This slowed acceleration occurs because the falling magnet induces currents inside the metal tube. The induced currents then produce a small magnetic field that opposes the direction of the original magnetic field. This effect is known as Lenz's Law, a result of Faraday's law of induction.

Comments (2)

Great demo, the reverse effect found in a rail gun using lenz’ law too!

Posted over 6 years by Anonymous

i never heard about lenz’s law but with this video i will be motivated to research more about

Posted almost 5 years by yassine

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

MIT Department of Physics Technical Services Group

MIT Department of Physics Technical Services Group

Category: Science | Updated over 2 years ago

Created
April 02, 2008 11:52
Category
Tags
License
Creative Commons Attribution-NonCommercial (What is this?)
Additional Files


Viewed
49869 times

More from MIT Department of Physics Technical Services Group

Monkey and a Gun

Monkey and a Gun

Added 7 years ago | 00:01:16 | 63426 views

Hero's Engine

Hero's Engine

Added almost 5 years ago | 00:01:38 | 22360 views

Curie Point of Iron

Curie Point of Iron

Added over 3 years ago | 00:01:23 | 5319 views

The Coriolis Effect

The Coriolis Effect

Added 6 years ago | 00:03:00 | 82803 views

Waves on a Chain

Waves on a Chain

Added 6 years ago | 00:01:26 | 43941 views

MIT Physics Demo -- Microwave Polarization

MIT Physics Demo -- Microwave Polar...

Added over 7 years ago | 00:01:14 | 35978 views