21. Detecting Planetary Magnetism The spacecraft also might detect magnetism caused by the solar wind or the The movementof particles within the magnetosphere can also produce magnetic fields. http://www.windows.ucar.edu/tour/link=/physical_science/magnetism/detect_planet_

Detecting Planetary Magnetism This diagram shows the magnetosphere of Jupiter. Click on image for full size ( 92K GIF Windows to the Universe original artwork A magnetometer is an instrument for measuring magnetic fields . Many spacecraft carry magnetometers to measure the magnetic fields around planets . When a spacecraft makes those measurements, what do the measurements tell us? The planet might have a global magnetic field surrounding it. Earth does, which is why compasses work. So do Mercury, Jupiter Saturn Uranus , and Neptune . Electrical currents in Earth's core generate its magnetic field. The core consists of iron and nickel, which are good conductors of electricity. Similarly, Mercury has an iron core which produces its field. Areas surrounding the cores of Jupiter and Saturn are filled with liquid metal hydrogen. This strange substance exists only at the high pressures and temperatures found deep inside massive gas giant planets. Flow of electricity in the liquid metal hydrogen produces the strong magnetic fields Jupiter and Saturn. The magnetic fields of Uranus and Neptune are generated by current flow in slushy, salty water inside those frozen gas giants.

22. Planetary Magnetism Venus is special case of a rocky planet with no magnetic field. Moreon magnetism. How We Detect Magnetic fields with Spacecraft. http://www.windows.ucar.edu/tour/link=/physical_science/magnetism/planetary_magn

Planetary Magnets This is a drawing of Earth with its magnetic field. Click on image for full size version ( 40K GIF Image from: NASA The Earth is a good example of a planetary dipole, where the lines of force point in a direction out of the South (magnetic) Pole and into the North (magnetic) Pole. Planets can also show evidence of quadrupoles (4 poles) and octupoles (8-poles). Not every planet has a magnetic field. It takes special conditions to make a magnetic field within a planet. Other planets known to have a magnetosphere include Mercury, Mars (perhaps), Jupiter, Saturn, Uranus, and Neptune. Venus is special case of a rocky planet with no magnetic field. More on Magnetism How We Detect Magnetic Fields with Spacecraft Last modified June 3, 2003 by the Windows Team The source of this material is Windows to the Universe , at http://www.windows.ucar.edu/

23. Introduction To Magnetic Forces And Fields Well, since the only objects in the experiment are wires, we can make the followingstatement linking electricity and magnetism Magnetic fields are caused by http://www.sparknotes.com/physics/magneticforcesandfields/intro/section1.html

Advanced Search FAQ document.write("My Preferences"); My Preferences Related Message Boards Astrophysics Mechanics Relativity Quantum Mechanics ... Thermodynamics We want your feedback! Please let us know if you have any document.write("comments, "); document.write("requests, "); document.write("or if you think you've found an "); document.write("error."); comments requests , or if you think you've found an error Watch us work! Home Free Study Aids ... Introduction to Magnetic Forces and Fields History of the Study of Magnetism - Navigate Here - Introduction History of the Study of Magnetism Magnetism Deduced from Relativity History of the Study of Magnetism Because magnetic fields were not discovered until recently, the history of how they were discovered is quite interesting, and informative. The Detection of Magnetic Fields We begin by giving an empirical history of the development of electromagnetic theory. As stated, people had long known that magnetic fields existed, but the only known source of these fields were permanent magnets, and no link was made to electricity. In the early 1800's, Hans Christian Oersted began to make the connection between electricity and magnetism. Oersted did most of his work using compass needles, but we will derive the existence of magnetic fields, and their relation to electricity, using more familiar systems-current carrying wires.

24. A41 - Electricity And Magnetism; Fields And Charged Particles A41 Electricity and magnetism; fields and charged particles. A4100- Electricity and magnetism; fields and charged particles. A4110 http://www.ub.uio.no/umn/fys/klass/a4100.html

UiO - nettsider UiO - personer BIBSYS - forfatter BIBSYS - tittel WWW - Google Om UiO Studier Studentliv Forskning ... Fysisk bibliotek A41 - Electricity and magnetism; fields and charged particles - Electricity and magnetism; fields and charged particles - Classical electromagnetism - Electrostatics, magnetostatics - Steady-state electromagnetic fields, electromagnetic induction - Electromagnetic waves: theory - Particles in electromagnetic fields: classical aspects - Particle beams and particle optics - Electron beams and electron optics - Ion beams and ion optics - Other topics in electricity and magnetism Redaksjon: Fysisk bibliotek Fysisk.bibliotek@ub.uio.no Dokument opprettet: 15.05.2001 Kontakt UiO Hjelp

25. Magnetism And Magnetic Fields next up previous Next magnetism Up lectures Previous Worked Example4 Energy magnetism and magnetic fields. Subsections magnetism; http://farside.ph.utexas.edu/teaching/302l/lectures/node53.html

Next: Magnetism Up: lectures Previous: Worked Example 4: Energy Magnetism and magnetic fields Subsections Magnetism The Lorentz force Motion of a charged particle in a magnetic field The Hall effect ... Worked Example 2: Charged particle in magnetic field Richard Fitzpatrick 2002-05-19

26. Magnetism Resource Lesson magnetism. Magnetic fields can be defined as the regions surroundinga magnet where another magnet or a moving electric charge will feel a force http://online.cctt.org/physicslab/content/PhyAPB/lessonnotes/magnetism/magnetism

Resource Lesson Magnetism Magnetic fields can be defined as the regions surrounding a magnet where another magnet or a moving electric charge will feel a force of attraction or repulsion. The strengths of magnetic fields are measured in a unit called Teslas, T. In formulas, the strength of a magnetic field is represented by the variable B As shown below, magnetic field lines emerge from the North pole of a magnet and enter the South pole. Field lines can be visualized by sprinkling small iron filings over a magnet as shown in the following animation sponsored by the magnetic resonance lab at FSU. When a compass (or any freely floating bar magnet) points north, it is actually aligning its north pole to the Earth's magnetic south pole. Yes, the Earth's geographic north pole is a magnetic south pole. Magnetic field lines surrounding poles that have the same polarity repel just like those between similarly charged particles and are hyperbolic in shape. Conversely, field lines between poles having the opposite polarity attract and are elliptical in shape. This can be visualized with this second animation from the Molecular Expressions gallery at FSU.

27. Magnetism And Induction Magnetic fields are measured in Tesla 1 T field exists when 1 meter ofwire carrying 1 amp of current experiences 1 N of magnetism force. http://online.cctt.org/physicslab/content/PhyAPB/review/summaries/Magnetism.asp

APB Review Sessions Magnetism and Induction Curriculum Guide Web Resources Resource Lessons: Magnetism Forces on Moving Charges Current Carrying Wires Induction ... Motors and Generators Physlets: Forces on Moving Charges Induction Coil Amusing Problems: Magnetic Forces NextTime Questions: Magnetism and Induction Worksheets: Magnetic Forces CP: Magnetism Induction CP: Transformers Magnetic fields are measured in Tesla - 1 T field exists when 1 meter of wire carrying 1 amp of current experiences 1 N of magnetism force. B fields into the plane of the paper are represented by X B fields out of the plane of the paper are represented by moving charges experience magnetic forces F = q v B = q v B sin q RHR - thumb points in direction of the positive particle's velocity, fingers in the direction of B , and palm in the direction of the force F B = F C that is, moving charges are forced into circular paths while traveling through magnetic fields - paths are usually described as cw or ccw q v B = m ( v ² / r ) the time required for one revolution in these circular paths is independent of the particle's velocity v = (2 p r) T the radius of the particle's circular path is directly proportional to the particles mv, and inversely proportional to the particle's charge and the strength of the magnetic field

28. Magnet Man - Cool Experiments With Magnets Demagnetizing fields; Physical impact; What is near the Geographic North Pole, aMagnetic North or a Magnetic South? Experiment; Flipflopping poles; magnetism in http://my.execpc.com/~rhoadley/magindex.htm

Cool Experiments with Magnets This web site is devoted to magnetism and the cool experiments you can do with permanent magnets and electro-magnets. Some of the experiments are very basic - things you've done since second grade. Others are unique; perhaps you hadn't thought of doing some of these before, or had difficulty in trying to set them up. Lists of the materials needed for the demonstrations, directions on how to assemble them, instructions on how to show them, and notes on how they work are all here for you. Also shown are several cool magnetic toys you can buy. Of course, there are also links to useful sites, sources and books on magnets. Have fun experimenting! Rick Hoadley (For other cool toys and puzzles , check this out) Last updated: 30May2004. More to come! Here's what's new Wherever you see , that means that at the underlined link there is some kind of experiment you can buy or build which will help you learn about the world of magnetism. Find ANY word Find ALL words Find EXACT phrase Help Magnet basics Safety Considerations What is magnetism?

29. THE MAGNETIC FIELD - A CROP CIRCLE UNDER SCRUTINY FOR MEANING magnetism had long been considered a side attraction in astronomyhard to measure,hard to master, seemingly The basic trouble is that the fields are invisible http://www.greatdreams.com/biomag.htm

THE MAGNETIC FIELD A CROP CIRCLE OF JULY, 2000 UNDER SCRUTINY FOR MEANING JULY 22, 2000 (This page is graphics intensive) VIEW IN FULL SCREEN NOTE: I discovered this first dream in my journal, after this page was already published: Surprise! Surprise! Surprise! Subj: DID THEY CALL THAT CROP CIRCLE A 'MOIRE'? Date: 08/01/2000 From: Dee777 5-28-00 - DREAM - This dream left me feeling disturbed somewhat because I don't understand it. I was on 12th St. in Milwaukee. The High School I went to was on the east side of the street. On the West side, some farmer or someone was plowing up the entire area and the soil was turning to yellow powder. It seemed like he was plowing it into useless nothing....? I went to an outdoor bathroom and changed clothes. I put on a man's pair of black and white checked shorts with straps to hold them up. They also had a series of large black buttons down the front which seems superfluous but they all had to be buttoned. I had to step into these shorts from behind, through the straps. It was kind of confusing but once they were on and I buttoned them, they fit pretty good. I then went to a shopping mall where women were dressed like women in suits and high heeled shoes and for some reason I was angry or something and was throwing low heeled shoes at them like I was angry.

30. Magnetism There is a fundamental connection between electrity moving electrons - andmagnetism. Moving electrons have magnetic fields, and magnetic fields make http://kosmoi.com/Science/Physics/Magnetism/

EncycloZine Astronomy Biology Chemistry ... What Magnets Can Do (Rookie Read-About Science) Allan Fowler Irresistible Attraction: Secrets of Personal Magnetism Kevin Hogan, Mary Lee Labay, Jack Swaney Angels Don't Play This haarp: Advances in Tesla Technology Nick Begich, Jeane Manning Charisma : Seven Keys to Developing the Magnetism that Leads to Success Tony Alessandra Treatise on Electricity and Magnetism, Vol. 1 James Clerk Maxwell Magnetic Current Edward Leedskalnin Electricity and Magnetism (Usborne Understanding Science) Peter Adamczyk, Paul-Francis Law, Andy Burton, E. Humberstone Physics for Scientists and Engineers: Electricity and Magnetism Light Paul A. Tipler Electricity and Magnetism, Vol. II Berkeley Physics The Forces of Matter (Great Minds) Michael Faraday Magnetism About Us A - Z Site Map Top Pages ... Cell Phones See also: Physics Links Kosmoi.com Science ... Magnetism Magnets attract some metals, such as iron, nickel, cobalt, and some alloys . You can magnetise a piece of one of these metals by stroking it with a magnet. Magnetic Poles When a magnet is suspended freely, one side points North. This is called the North pole of the magnet. The other side points South, and is called the South pole of the magnet.

31. The Educational Encyclopedia, Physics, Electricity & Magnetisme magnetism and magnets some general information on magnetism and magnetic physics.magnetism, magnetic fields magnetism, magnetic fields, right hand rule, http://users.pandora.be/educypedia/education/electricity.htm

Science Animals Biology Botany Bouw ... Resources Physics Electricity Energy General overview Lasers Optics ... Waves Electricity related subject: Electronics: electricity Electronics: magnetism Capacitors a capacitor is an electronic component which is used in a wide variety of circuit applications due to its ability to store charge Capacitors and RC-decay Champ d'action champ magnétique, champ électrique, lignes de force, en Français Champ magnétique en Français Charged parallel plates charged parallel plates Condensateur en Français Cool experiments with magnets devoted to magnetism and the cool experiments you can do with permanent magnets and electro-magnets. Some of the experiments are very basic Coulomb's Law Coulomb's Law Current and resistance Kirchhoff's laws Electric blue sparks (static generator) Electric charge electric charge, electric charge, electrostatics, electron, proton, neutron, positive and negative ions, principle of conservation of electric charge, conductor and insulator, induced charge, point charge, Coulomb's law, coulomb, principle of superposition of forces, electric field, test charge, vector field, source point, field point Electric fields electric fields Electric fields and potentials properties of electric charges Electric field strength (field intensity) electric field strength (field intensity) Electrical discharges electrical discharges Electrical energy and electrical potential (not the same thing!)

32. The Educational Encyclopedia, Electricity, Magnetisme magnetism and electromagnetism. magnetism, magnetic fields magnetism, magneticfields, right hand rule, Electromagnetism, inductors, and transformers. http://users.telenet.be/educypedia/electronics/electricitymagnetisme.htm

Electronics Acoustics Analog Antennas Audio ... Resources Electricity Basic theory Electric circuit theory Electrical power systems General ... Lightning Magnetism Miscelleneous topics Safety Tesla coil Magnetism Basics of magnetics magnetics, pdf file Bobine à noyau de fer pdf file, en Français Champ magnétique en Français Champ magnétique en Français Circuit magnétique en Français Circuit magnétique en Français Circuits magnétiques pdf file, en Français Circuit magnétique linéaire en Français, pdf file Circuit magnétique en regime impulsionelle en Français, pdf file Circuits magnétiques en régime sinusoïdal : la bobine à noyau de fer en Français, pdf file Circuits magnétiques des machines en Français Classes of magnetic materials Cool experiments with magnets devoted to magnetism and the cool experiments you can do with permanent magnets and electro-magnets. Some of the experiments are very basic, motors, levitation, electromagnets, Lenz, Faraday, neodymium, experiments with magnets, superconductors, superconductivity, electromagnetism, magnetic toys, magnetic fields Cycle d'hystérésis pdf file

33. 3D Magnetic Field Viewer Bottle A similar thing happens with the electric fields created by high voltage and by staticelectricity. If small fibers are exposed to a Links to magnetism sites http://www.amasci.com/electrom/statbotl.html

ELECTRICITY BOOKS GOOD STUFF NEW STUFF ... HELP! SEEING MAGNETIC FIELD PATTERNS IN 3D 1988 William Beaty, Museum of Science, Boston Iron filings align themselves in strong magnetic fields. This reveals the shape of the field patterns. A similar thing happens with the electric fields created by high voltage and by "static electricity." If small fibers are exposed to a very strong electric or magnetic field, they will align with the field and make it visible. 3D MAGNETIC AND ELECTRIC FIELD VIEWING BOTTLE MATERIALS: Magnet Extra-fine steel wool Plastic bottle full of baby oil with paper label Scissors OPTIONAL: rubbing alcohol pan or shallow dish for the alcohol White spray-paint, if desired Links to magnetism sites Other build-it projects REMOVE THE LABEL Make sure to buy baby oil with a removable paper label, NOT the kind with a permanent, painted-on label. Even better, try to find a bottle that has a label only on one side. If your bottle has labels on both sides, peel the label from one side of the oil bottle. You can do this by picking at the paper label with fingernails while running warm water on it. An easier way is to soak one side of the bottle in a shallow dish of rubbing alcohol for about 10 or 15 minutes. Peel off the gooey label. Use a bit of alcohol and a paper towel to clean off the remaining glue. (It really is easier to find a bottle at the store that only has a label on one side!) MAKE THE STEEL FIBERS Obtain extra fine steel wool. This is the kind that looks like a rolled-up wad of grey hair, NOT the kind that looks like a coppery coarse net used for scrubbing dishes. Any grade of wool will work, but extra-fine wool will settle more slowly, so you don't have to shake the bottle so often.

34. Weird Science: Chemistry, Magnets, And Skepticism skepticism regarding the ability of DC and lowfrequency magnetic fields to affect Upuntil the 1980s, research involving magnetism and chemistry was too weird http://www.amasci.com/freenrg/magh2o.html

UP TO WEIRD SCI. GOOD STUFF NEW STUFF HELP! Mainstream scientists resist the idea that magnetism can affect chemistry. For example, they see any use of PM-magnets to relieve human pain as disgusting pseudoscience which should be stamped out. And the continuing controversy about a possible link between EMFs and Cancer is in part due to the widespread scientific skepticism regarding the ability of DC and low-frequency magnetic fields to affect a chemical bond. The skeptics seem to think that if such an important phenomena was real, researchers would already know about it. Up until the 1980s, research involving magnetism and chemistry was too weird to attract funding. However, the scoffers are wrong. Research increasingly reports evidence that EMF and permanent magnets DO have significant effects upon chemical reactions, especially on sensitive biochemistry. This is 'taboo science', and it causes some of the more-conventional researchers to react with a skepticism almost approaching violence. After all, if this simple phenomenon was missed by thousands of professional chemists, it damages their reputations as experts and makes them look like fools. It's especially painful to those who have loudly and publicly ridiculed these ideas. Evidence should have a clear voice, but when personal reputations and "science politics" are involved, the voice of the evidence often goes unheard. Disgust and derision take the place of curiousity and truth-seeking, and the verification of the reported observations can conveniently become unimportant.

35. Gravity And Magnetic Fields, Chi, Reiki, Earth Magnetic Field, Magnetism, Magnet fields would not be readily observable on Earth because the relative magnetic fieldis weak for small objects (mass). Also, current thinking links magnetism to http://www.reikiflow.com/relative_magnetic_fields.html

Gravity, Relative Magnetic Fields and Chi "In terms of Relative Magnetic Fields, the Earth is the Center of the Universe" "There is something Faster than the Speed of Light" First published 01-30-03 Revised 05-05-04 Gra In order to prove that Chi exists as subtle magnetic energy it may require rethinking the rol e that gravity plays in relation to magnetic fields, specifically how a mass moving at right angles to the pull of gravity creates a field of magnetic force (perhaps a maximum field). Normally, the relationship between gravity and magnetic fields would not be readily observable on Earth because the relative magnetic field is weak for small objects (mass). Also, current thinking links magnetism to ferrous metals. My premise is that the mass does not have to be ferrous or metallic and that the field created would normally be too low for our current sensors to detect in most circumstances. However, for large objects and celestial bodies the data may be there if one looks for it. There is also a possibility that even though the current detectable magnetic property of a material seems to disappear when heated, the inherent subtle magnetic field may still remain intact. This could point to the possibility that these materials take on a stronger magnetic signature over time due additional forces in the Earth's core but owe their inherent magnetism to the force of gravity. Along this same line of reasoning, assuming that the original premise that a mass moving at right angles to the pull of gravity creates a field of magnetic force is correct, the

36. Magnetism: Magnetic Poles, Forces, And Fields Related content from HighBeam Research on magnetism Magnetic Poles,Forces, and fields. magnetism (The Hutchinson Dictionary of http://www.infoplease.com/ce6/sci/A0859426.html

HOTWORDS CITE PRINT EMAIL in All Infoplease Almanacs Biographies Dictionary Encyclopedia Home Almanacs Atlas Dictionary ... Father's Day Infoplease Tools Periodic Table Conversion Tool Perpetual Calendar Year by Year ... Site Map Also from Infoplease Search Infoplease Info search tips Search Biographies Bio search tips Encyclopedia magnetism Magnetic Poles, Forces, and Fields Any object that exhibits magnetic properties is called a magnet. Every magnet has two points, or poles, where most of its strength is concentrated; these are designated as a north-seeking pole, or north pole, and a south-seeking pole, or south pole, because a suspended magnet tends to orient itself along a north-south line. Since a magnet has two poles, it is sometimes called a magnetic dipole, being analogous to an electric dipole, composed of two opposite charges. The like poles of different magnets repel each other, and the unlike poles attract each other. One remarkable property of magnets is that whenever a magnet is broken, a north pole will appear at one of the broken faces and a south pole at the other, such that each piece has its own north and south poles. It is impossible to isolate a single magnetic pole, regardless of how many times a magnet is broken or how small the fragments become. (The theoretical question as to the possible existence in any state of a single magnetic pole, called a monopole, is still considered open by physicists; experiments to date have failed to detect one.) From his study of magnetism, C. A. Coulomb in the 18th cent. found that the magnetic forces between two poles followed an inverse-square law of the same form as that describing the forces between electric charges. The law states that the force of attraction or repulsion between two magnetic poles is directly proportional to the product of the strengths of the poles and inversely proportional to the square of the distance between them.

37. Magnetism Another relationship between electricity and magnetism is that a regularly changing Inthis way regularly oscillating electric and magnetic fields can generate http://www.crystalinks.com/magnetism.html

Magnetism Magnetism is a force of attraction or repulsion between various substances, especially those made of iron and other metals. Ultimately it is due to the motion of electrical charge. It is related to Physics. Magnetic Poles, Forces, and Fields Any object that exhibits magnetic properties is called a magnet. Every magnet has two points, or poles, where most of its strength is concentrated; these are designated as a north-seeking pole, or north pole, and a south-seeking pole, or south pole, because a suspended magnet tends to orient itself along a north-south line. Since a magnet has two poles, it is sometimes called a magnetic dipole, being analogous to an electric dipole, composed of two opposite charges. The like poles of different magnets repel each other, and the unlike poles attract each other. One remarkable property of magnets is that whenever a magnet is broken, a north pole will appear at one of the broken faces and a south pole at the other, such that each piece has its own north and south poles. It is impossible to isolate a single magnetic pole, regardless of how many times a magnet is broken or how small the fragments become. (The theoretical question as to the possible existence in any state of a single magnetic pole, called a monopole, is still considered open by physicists; experiments to date have failed to detect one.) From his study of magnetism, C. A. Coulomb in the 18th cent. found that the magnetic forces between two poles followed an inverse-square law of the same form as that describing the forces between electric charges. The law states that the force of attraction or repulsion between two magnetic poles is directly proportional to the product of the strengths of the poles and inversely proportional to the square of the distance between them.

38. Magnetism FAQs and magnetism is light, which is known to physicists as an electromagnetic wave.Light waves are oscillating patterns of electric and magnetic fields, http://www.matchrockets.com/ether/magfaqs.html

home message board FIRE WATER ... products Magnetism FAQs Here is some general information on magnetism and magnetic physics. We hope that you find this useful. It is from our sister site, Wondermagnet.com. You might also want to look at Wondermagnet's discussion board for more information and to see what other folks have to say. What is a magnetic field? What are magnetic field lines? What is the north pole of a magnet and how can I identify it? How strong is the magnetic field at a given distance from the magnet? How are magnetic fields measured? ... Why won't my perpetual motion machine work? What is a magnetic field? What are magnetic field lines? Magnetic fields are historically described in terms of their effect on electric charges. A moving electric charge, such as an electron, will accelerate in the presence of a magnetic field, causing it to change velocity and its direction of travel. This is, for example, the principle used in televisions, computer monitors, and other devices with CRTs ( cathode-ray tubes ). In a CRT, electrons are emitted from a hot filament. A voltage difference pulls these electrons from the filament to the picture screen. Electromagnets surrounding the tube cause these electrons to change direction, so they hit different locations on the screen.

39. Magnetism And The Sun: Magnetic Fields One way to describe magnetism is through magnetic fields. A magneticfield defines the magnetic force, the push or pull, felt http://solar-center.stanford.edu/magnetism/magneticfields.html

Magnetic Fields Next-> Home Introduction Magnetic Force ... Bibliography One way to describe magnetism is through magnetic fields . A magnetic field defines the magnetic force, the "push" or "pull," felt by a particle independent of its charge and velocity (the speed and direction of the particle) due to the presence of other moving charges. The stronger the field, the stronger the magnetic force felt by the particle. Likewise, the weaker the field, the weaker the magnetic force. In addition to describing the strength of magnetic force at various points in space, the magnetic field also describes the direction of the force on a particle with respect to its velocity. Magnetic fields can be visualized using magnetic field lines . These lines are curves where: At every given point the tangent (the line that intersects the curve only at the given point for an infinitesimal distance) is in the same direction as the magnetic field . If one were to place a compass in a magnetic field, the needle would point tangential to the magnetic field line. The magnetic field magnitude is proportional to the density of the lines.

40. Magnetism And The Sun: Stored Energy In Magnetic Fields final aspect of magnetism that is necessary to have a basic understanding of thedynamics on the surface of the Sun is the idea that magnetic fields can store http://solar-center.stanford.edu/magnetism/magneticenergy.html

Stored Energy in Magnetic Fields Next-> Home Introduction Magnetic Fields ... Bibliography The final aspect of magnetism that is necessary to have a basic understanding of the dynamics on the surface of the Sun is the idea that magnetic fields can store energy. The energy stored in a magnetic field is essentially the total amount of work required to assemble a system of moving charges. Stored energy in magnetic fields can be illustrated in the following experiment with a pair of magnets. Magnet Acrobatics: Equipment: Two magnets Procedure: Place a magnet on the table and hold it in place with one hand. Orient the other magnet above the one on the table such that each pole faces the same pole on the other magnet. Bring the top magnet down onto the other one on the table. The magnets should repel each other as you do this. Hold the stacked magnets together. Let go of the magnets, being sure to move your hands out of the way. The magnets will perform their acrobatics. What's Going On? When the two magnets are brought together, a force must be exerted for a given distance, i.e. work is being done to bring these two magnets together. Energy in the form of moving magnets is released when the one lets go of them. This release of energy causes them to jump. Next-> Home Introduction Magnetic Fields ... Return To Activities Last revised by Eugene on August 25, 1999

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