Teach Engineering
Changing Fields
Eddy currents, Faraday's Law and Lenz's Law provide the connection between train brakes and and MRI machines in a lesson that asks teachers to provided the material needed so the pupils can understand the properties of changing magnetic...
Curated OER
Science: Lenz's Law and the Spinning Can
Students observe a demonstration of Lenz's Law using an aluminum can and a bar magnet. They hypothesize what will occur as the can is placed in water and the magnet is lowered above it on a string. Students discover the phase shift...
Science Buddies
Science Buddies: Abracadabra! Levitating With Eddy Currents!
Did you know that not all trains run on tracks? Some of the world's fastest trains are magnetic levitation trains (maglev). This means that the carriage of the train is suspended over the rails with no support, but only with magnetic...
TeachEngineering
Teach Engineering: Mri Safety Grand Challenge
This module was written for a first year accelerated or AP physics class. It is intended to provide hands on activities to teach end of the year electricity and magnetism topics including the magnetic force, magnetic moments and torque,...
TeachEngineering
Teach Engineering: Changing Fields
This lesson begins with an activity in which students induce EMF in a coil of wire using magnetic fields. Then, demonstrations on Eddy currents show how a magnetic field can slow magnets just as Eddy currents are used to slow large...
Florida State University
Florida State University: Magnet Lab: Faraday Cage
A faraday cage is an important tool for some scientists at the MagLab. But they don't work with it: they work inside it.
National High Magnetic Field Laboratory
Magnet Academy: Foucault's Disk
Leon Foucault, a French physicist much better known for his pendulum demonstrating the rotation of the Earth, also created in 1855 a device that illustrated how eddy currents work. (Java tutorial)