Lessons Related to Basic Electromagnets
| title | description | rating | post date | author | |
|---|---|---|---|---|---|
| Slow Motion Magnets |
Drop a strong magnet through a copper pipe and watch it slow down as it enters the pipe. The invisible drag is caused by forces between the pipe and the magnet, induced according the laws of electromagentism. It's a magical demonstration for a class, made even better if the... |
(3 votes) |
3-Mar-14 | guy |
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| Homemade Headphones from Picnic Supplies |
This lesson provides instructions for building a pair of headphones (or speakers) out of inexpensive materials. It makes for a good science project lasting several hours or a quick demonstration in class if you are willing to build ahead of time, though for a single... |
(6 votes) |
12-Aug-13 | guy |
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| Homemade Telegraph |
Construction plans and suggestions for a homemade telegraph. Serves as a good application for studying electromagnets. |
(16 votes) |
12-Apr-13 | guy |
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| Diamagnetism - Levitating Graphite and Frogs |
Diamagnetic materials are repelled by a magnet, in contrast to magnetic materials (like iron), which are attracted to a magnet. This lesson describes several demonstrations of diamagnetic repulsion using water and graphite (both diamagnets), with inexpensive setups. The most... |
(6 votes) |
17-Feb-13 | guy |
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| Faraday Motor |
This lesson shows how to construct and operate a modern version of the first electric motor, invented by Michael Faraday. It serves as an excellent demonstration or hands-on activity to show the basic principles behind the operation of an electric motor. Learning goals... |
(4 votes) |
30-Jan-13 | guy |
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| Minimalist Motors |
Building a simple motor is much easier than most people realize. All it takes is a battery, a magnet and a piece of wire. This lesson reviews some simple motors and demonstrates a minimalist design constructed from a button cell battery, some wire, and a small but... |
(2 votes) |
26-Jan-13 | guy |
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| An Electric Screw Motor |
This lesson gives instructions for one of the simplest and most popular designs for a homemade motor. It can be used as an in-class demonstration, or a hands-on activity for students, or a take-home kit. In any of these modes, it offers a wonderful introduction to the... |
(4 votes) |
25-Jan-13 | guy |
 |
| Safety Pin Motor |
This lesson describes a simple motor that can be constructed in 15 minutes with inexpensive materials. It involves all the basic principles of motors involving magnetic force, electromagnets, and commutators (rotating switches common in many commercial motors). This device... |
(6 votes) |
25-Jan-13 | guy |
 |
| A Survey of Simple Electric Motors |
This lesson provides general background on motors and surveys a number of projects for constructing simple motors. Motors teach us about several of the basic ideas of electromagnetism, but the fundamental operation of a motor rests on only two simple principles: ... |
(2 votes) |
24-Jan-13 | guy |