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Basics of magnetism

Introduction to magnetic fields and forces.

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http://www.school-for-champions.com/science/magnetism.htm

Electromagnetism

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.

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http://library.thinkquest.org/15433/unit6/6-4.htm

Magnetism Demo

Instructions on how to make high magnetic fields without the need for large currents

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Hits: 1163

http://www.amasci.com/exhibits/hiamp.txt
hyperphysics

Lenz's Law

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 ...

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Hits: 1612

http://hyperphysics.phy-astr.gsu.edu/hbase/electric/farlaw.html#c1
hyperphysics

Motor

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.

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Hits: 2118

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemot.html#c1

Magnetism and the San Francisco Bay area

An exploration of the earth's magnetic field and the links between magnetic anomalies and the geology of the San Francisco Bay area.

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Hits: 1006

http://geomaps.wr.usgs.gov/gump/people/zulanger/bayarea/magnetism_ofr.html

Faraday Introduction

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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Hits: 1156

http://webphysics.davidson.edu/applets/faraday4/outline_Faraday.html
hyperphysics

Electromagnet

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 ...

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Hits: 999

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemag.html#c5

The Penning Trap

In a Penning trap charged particles (ions) can be stored with a superposition of a magnetic field and a static electric field.

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Hits: 1034

http://wswww.physik.uni-mainz.de/werth/g_fak/penning.htm
hyperphysics

Induction motor action

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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Hits: 2282

http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/indmot.html#c1
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Showing 21 - 30 of 241