TeachEngineering
Teach Engineering: Electricity and Magnetic Fields
The grand challenge for this legacy cycle unit is for students to design a way to help a recycler separate aluminum from steel scrap metal. In previous lessons, they have looked at how magnetism might be utilized. In this lesson,...
Florida State University
Florida State University: Molecular Expressions: Magnetic Fields and Compass Orientation
Simulate the creation of an induced magnetic field through the use of a simple electric circuit. An interactive demonstration is included.
TeachEngineering
Teach Engineering: Circuits and Magnetic Fields
In this activity, students use the same method as in the activity from lesson 2 to explore the magnetism due to electric current instead of a permanent magnet. Students use a compass and circuit to trace the magnetic field lines induced...
Science Education Resource Center at Carleton College
Serc: Investigating Motors and Magnetism
Students will build a simple DC motor out of metal coat hangers, a 24-guage wire armature and field magnet, 14-guage wire brushes, and build the motor so that it rotates when connected to a 10-volt DC power supply. Students will...
Other
Sc Icentre: Magnets and Magnetism
Gives a simple description of the theory of magnetism and the properties of a magnet. Very good descriptions for beginning level.
TeachEngineering
Teach Engineering: Induced Emf in a Coil of Wire
Students use a simple set up consisting of a coil of wire and a magnet to visualize induced EMF. First, students move a coil of wire near a magnet and observe the voltage that results. They then experiment with moving the wire, magnet,...
TeachEngineering
Teach Engineering: Electromagnets
In this activity, the students will complete the grand challenge and design an electromagnet to separate steel from aluminum for the recycler. In order to do this, students compare the induced magnetic field of an electric current with...
Physics Aviary
Physics Aviary: Induced Current Lab
This lab was designed to have students test the factors that determine how much current is induced in a circuit when area of the circuit is changed. This lab is a quantitive lab that supplements the lab on magnetic flux.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Faraday Loop Model
Complete this model of a Faraday loop by adding the equations to explicate a conducting loop in a constant magnetic filed.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Falling Loop Model
Change the size and orientation of a conducting loop falling out of a region of uniform magnetic field. Then, the data is plotted on an interactive graph.
Wikimedia
Wikipedia: Electromagnet
Easy-to-read information and an illustration of an "electromagnet," a type of magnet in which the magnetic field is induced by the flow of an electric current.
Florida State University
Florida State University: Lenz's Law
Lenz's Law is defined and demonstrated with an interactive Java applet that shows the relationship between field lines of a magnetic and a conductor ring.
Georgia Department of Education
Ga Virtual Learning: Electromagnetic Induction
In this interactive tutorial students will learn about a magnetic flux, induced current and how to apply Lenz's Law.
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...
TeachEngineering
Teach Engineering: Whose Field Line Is It, Anyway?
Students teams each use a bar magnet, sheet of paper and iron shavings to reveal the field lines as they travel around a magnet. They repeat the activity with an electromagnet made by wrapping thin wire around a nail and connecting...
PBS
Pbs Teachers: Scientific American: 21st Century Medicine: Image Guided Surgery
Investigate the science and medical diagnostic uses of magnetic resonance imaging (MRI) technology. Perform experiments to observe how magnetic properties can be induced, and measure the force of temporary magnets.
Science Education Resource Center at Carleton College
Serc: Electromagnetic Induction Demonstration
Students learn the relationship between the electric and magnetic fields. Specifically, they verify that a magnetic field is created in a current carrying coil of wire and a changing magnetic field can induce a current in another coil of...
CK-12 Foundation
Ck 12: Lenz's Law
[Free Registration/Login may be required to access all resource tools.] Lenz's law is explained and demonstrated. It states that a magnetic field is produced in opposition to an induced current.
American Association of Physics Teachers
Com Padre Digital Library: Open Source Physics: Faraday Disk Dynamo Model
This simulation demonstrates a rotating conducting disk in a magnetic field which produces a current or a self-exciting dynamo.
Khan Academy
Khan Academy: What Is Faraday's Law?
Do you know how to induce an electromotive force? This reference page will help you understand why Faraday's law mean and how to use it.
Creative Science Centre
Creative Science Centre: 6 Generators
Apart from the piezo generator, all of these generators are based on the same simple design, where magnets are rotated near to coils of wire (Faraday Induction). There is no coil switching so these are AC generators. On magnet movement,...
Other
Ithaca Hs Ny/electrical Generator Ac or Dc/applet
What a lovely little applet! You can speed/slow it, change it from AC to DC, plot the voltage as it rotates, change direction, control other information. Real neat.
Science Education Resource Center at Carleton College
Serc: A Simple Motor/generator Demonstration for Use in Interactive Lecture
This apparatus is easy and inexpensive to construct and provides a clear and compelling demonstration of Faraday's Law of Induction and the Lorentz force. Two magnets are suspended from springs so that they are free to oscillate...