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Electromagnetism is the physics of the electromagnetic field: a field, encompassing all of space, which exerts a force on those particles that possess the property of electric charge, and is in turn affected by the presence and motion of such particles. The term electrodynamics is sometimes used to refer to the combination of electromagnetism with mechanics, and deals with the effects of the electromagnetic field on the dynamic behavior of electrically charged particles. Electromagnetism encompasses various real-world electromagnetic phenomena.
Electric and magnetic fields
It is often convenient to understand the electromagnetic field in terms of two separate fields: the electric field and the magnetic field. A non-zero electric field is produced by the presence of electrically charged particles, and gives rise to the electric force; this is the force that causes static electricity and drives the flow of electric charge (electric current) in electrical conductors. The magnetic field, on the other hand, can be produced by the motion of electric charges, or electric current, and gives rise to the magnetic force associated with magnets.
The term "electromagnetism" comes from the individual component electrical and magnetic forces involved. A changing magnetic field produces an electric field (this is the phenomenon of electromagnetic induction, which underlies the operation of electrical generators, induction motors, and transformers). Similarly, a changing electric field generates a magnetic field.
More on [ Electromagnetism ]
To end the day we learned two new forces (magnetism and static electricity) followed by Reading Buddies and Unfinished Work.
mrhancocksclass (Mr. Hancock) Fri, 20 Nov 2009 18:52:34 -0000
To end the day we learned two new forces (magnetism and static electricity) followed by Reading Buddies and Unfinished Work.
electricity, magnetism, or radiation kill cancer, aids, and more. Think of it as a stun gun and smoke detectors have radioactive material,
denebola (Joe Momma/JoseBuitch) Fri, 20 Nov 2009 07:59:35 -0000
electricity, magnetism, or radiation kill cancer, aids, and more. Think of it as a stun gun and smoke detectors have radioactive material,
Elementary Lessons in Electricity and Magnetism - Google Books Result http://tinyurl.com/yhvov4w
zk8susakfwi (Susanne Khan) Thu, 19 Nov 2009 21:40:15 -0000
Elementary Lessons in Electricity and Magnetism - Google Books Result http://tinyurl.com/yhvov4w
@aaindian And then onto the sublime moment connecting electricity and magnetism! To ecstasy!
Acorn (The Acorn) Thu, 19 Nov 2009 05:15:50 -0000
@aaindian And then onto the sublime moment connecting electricity and magnetism! To ecstasy!
CLASS -- XII CURRENT ELECTRICITY; MOVING CHARGES AND MAGNETISM... http://tinyurl.com/y9ve759
ella_n1sl (Ella Cervantes) Wed, 18 Nov 2009 04:03:18 -0000
CLASS -- XII CURRENT ELECTRICITY; MOVING CHARGES AND MAGNETISM... http://tinyurl.com/y9ve759
+ : is next to my James Clerk Maxwell's 1873 book "Treatise On Electricity And Magnetism" facsimile.. do well together.. ;-)
bikerbar (Michael @BikerBar) Tue, 17 Nov 2009 21:09:52 -0000
+ : is next to my James Clerk Maxwell's 1873 book "Treatise On Electricity And Magnetism" facsimile.. do well together.. ;-)
How Batteries Work - Shows the basic concepts behind these components which power all sorts of things such as cars, PCs, cameras, and cell phones.
Meta Description: [ Batteries power all sorts of things -- they're in our cars, our PCs, our cameras, our cell phones... Find out all about batteries, from the basic concept at work to the actual chemistry going on inside. ]
How Capacitors Work - Information about this component which plays a crucial role in electronics as it stores electrons for when they're needed most, dumping a huge charge instead of a steady flow.
Meta Description: [ The capacitor plays a crucial role in electronics -- it stores electrons for when they're needed most, dumping a huge charge instead of a steady flow. Find out about this basic electrical component. ]
How Electricity Works - Features detailed information on the subject such as basic concepts, units, circuits, generators, and uses.
Meta Description: [ Electricity is one of those things that completely surround us. For most of us, modern life would be impossible without it. So what is this mysterious stuff? Find out all about electricity. ]
How Electromagnets Work - Information about what makes this key part of motors, tape decks, VCRs and other devices.
Meta Description: [ Electromagnets are found in motors, tape decks, hard drives, VCRs and tons of other devices. Find out what makes an electromagnet ]
How Metal Detectors Work - Explains their uses and the electromagnetic properties that allow these units pinpoint and identify their target.
Meta Description: [ Metal detectors can do more than just detect metal -- they can tell you the kind of metal it is and even how deep it's buried. Learn how these units pinpoint and identify their target. ]
Science Snacks About Electricity - A set of very simple experiments, each one with details on materials, assembly, how to do ,and explanation of the key principles featured by Exploratorium.
Science Snacks About Magnetism - A set of very simple experiments, featured by Exploratorium, each one with details on materials, assembly, how to do, and an explanation of the physical laws involved.
Snap Crackle Jump - An edible physics experiment with static electricity and Rice Krispies.
| MIT 8.02 Electricity and Magnetism, Spring 2002 | |
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