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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 ...
Electromagnets are usually in the form of iron core solenoids. The ferromagnetic property of the iron core causes the internal magnetic domains of the iron to line up with the smaller driving ...
In a Penning trap charged particles (ions) can be stored with a superposition of a magnetic field and a static electric field.
Induction motors use shorted wire loops on a rotating armature and obtain their torque from currents induced in these loops by the changing magnetic field produced in the field coils.
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