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 6 years by Anonymous

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

Posted 4 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 1 year ago

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


Viewed
48167 times

More from MIT Department of Physics Technical Services Group

Charge and Electric Field of a Hollow Conductor

Charge and Electric Field of a Holl...

Added 3 years ago | 00:01:54 | 8157 views

Plate Sliding Under a Soda Can

Plate Sliding Under a Soda Can

Added almost 4 years ago | 00:00:50 | 16171 views

Double Pendulum

Double Pendulum

Added 4 years ago | 00:02:29 | 27968 views

Bell Labs Wave Machine: Matched Impedance

Bell Labs Wave Machine: Matched Imp...

Added almost 4 years ago | 00:01:13 | 11838 views

MIT Physics Demo -- Conductivity of Ionized Water

MIT Physics Demo -- Conductivity of...

Added over 6 years ago | 00:00:53 | 46302 views

Simulation of Magnetic Domains

Simulation of Magnetic Domains

Added over 2 years ago | 00:01:54 | 4432 views