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Both the electric field and magnetic field can be defined from the Lorentz force law. The electric force is straightforward, being in the direction of the electric field if the charge q is positive, ...
The Biot-Savart Law relates magnetic fields to the currents which are their sources. In a similar manner, Coulomb's law relates electric fields to the point charges which are their sources.
The site demonstrates the effect of a magnet field when introduced on a conducting wire.
Introduction to magnetic fields and forces.
This is a site from the Thinkquest competition with good explanations on the magnetic effect of a current, the motor effect and magnetic field strength.
Instructions on how to make high magnetic fields without the need for large currents
When an emf is generated by a change in magnetic flux according to Faraday's Law, the polarity of the induced emf is such that it produces a current whose magnetic field opposes the change which ...
Electric motors involve rotating coils of wire which are driven by the magnetic force exerted by a magnetic field on an electric current. They transform electrical energy into mechanical energy.
An exploration of the earth's magnetic field and the links between magnetic anomalies and the geology of the San Francisco Bay area.
This applet simulates a common physics "gedanken" or thought experiment. A wire placed in a magnetic field. The student is asked to calculate the flux and voltage if the field changes or the wire ...
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