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  • Teacher Workshop: Make a Magnetic Field - YouTube

    2012-12-14  This short video introduces teachers to how they can easily create a magnetic field visual using no more than a bar magnet, clear glass or plastic cover, and some iron shavings.

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  • Magnetism - Wikipedia

    OverviewHistorySourcesTypes of magnetismElectromagnetMagnetism, electricity, and special relativityMagnetic fields in a materialMagnetic force

    Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Magnetism is one aspect of the combined phenomenon of electromagnetism. The most familiar effects occur in ferromagnetic materials, which are strongly attracted by magnetic fields and can be magnetized to become permanent magnets, producing magnetic fields themselves. Only a fe

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  • Magnetic field - Wikipedia

    OverviewHistoryDefinitions, units, and measurementMagnetic field linesMagnetic field and permanent magnetsMagnetic field and electric currentsRelation between H and BEnergy stored in magnetic fields

    A magnetic field is a vector field that describes the magnetic influence of electric charges in relative motion and magnetized materials. The effects of magnetic fields are commonly seen in permanent magnets, which pull on magnetic materials (such as iron) and attract or repel other magnets. Magnetic fields surround and are created by magnetized material and by moving electric charges (electric currents) such as those used in electromagnets. They exert forces on nearby moving electrical charges and torques o

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  • MAGNETIC FIELDS - nde-ed.org

    MAGNETIC FIELDS. After completing this section you will be able to do the following: Explain how magnetic lines of flux are affected by other magnetic fields. In each of the following pictures a magnet is put onto a piece of paper. Then a light dusting of iron filings is sprinkled around the magnet. The lines around the magnets in the following ...

  • Magnetic Poles For Kids Science Experiment

    2019-07-20  Magnet attracts iron and the magnetism can act through many materials such as paper. When iron filings are spread over the magnets, you can see the outline of the magnetic force or the magnetic field.

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  • The Science of Magnetic Field Lines

    Iron filings and a compass may be used to trace the shape, strength, and direction of magnetic field lines. A magnetic field is a vector , which means it has magnitude and direction. If electric current flows in a straight line, the right hand rule shows the direction invisible magnetic field lines flow around a wire.

  • Behaviour of iron in magnetic field Physics Forums

    2006-02-23  Assume that iron dust is mixed with non magnetic dust or powder and it requires separation. How would the iron dust behave if the material containing the iron dust is allowed to fall through a magnetic field zone created by placing electromagnets in an array so that the magnetic zone is about 600 mm

  • Magnetic Field outside an Iron Core Solenoid Physics Forums2016-07-14Iron magnetism Physics Forums2016-05-21Magnetic field of iron core solenoid Physics Forums2013-01-01Magnetic Force on Iron Physics Forums2009-11-17查看更多结果
  • What are magnetic fields? (article) Khan Academy

    Magnetic field created by a current carrying wire. What are magnetic fields? This is the currently selected item. Magnetic force between two currents going in the same direction. Magnetic force between two currents going in opposite directions. Induced current in a wire. Next lesson. Electric motors . Magnetic field created by a current carrying wire. Magnetic force between two currents going ...

  • Why Does a Magnet Attract Iron? Sciencing

    2018-04-17  Most people know that iron is attracted to magnets, while other metals like gold and silver are not. Yet few people can explain exactly why iron has this magical relationship with magnetism. To arrive at the answer, you need to get down to the atomic level and examine the magnetic nature of an atom's electrons.

  • The Science of Magnetic Field Lines

    Iron filings and a compass may be used to trace the shape, strength, and direction of magnetic field lines. A magnetic field is a vector , which means it has magnitude and direction. If electric current flows in a straight line, the right hand rule shows the direction invisible magnetic field lines flow around a wire.

  • What is a Magnetic Field? (with pictures)

    2019-11-27  A magnetic field is an invisible field that exerts a magnetic force on substances that are sensitive to magnetism.A classic example of one is the field created by an iron magnet; to see how the energy in such a field works, a small magnet can be placed under a piece of paper and iron

  • magnetic fields - Can we isolate the iron ions in a ...

    A magnetic field won't do anything, but if you apply an electric field you can electrolyse the iron salt and produce metallic iron.. There are some other more involved ways it could be done. For example zeolites will selectively absorb some metal ions.

  • How to Create a Powerful Magnetic Field Sciencing

    2018-03-13  Select a piece of iron for the magnetic core. A 6 to 8 inch long piece of iron, such as a large nail or spike, will create a powerful magnetic field, but

  • Solenoid Magnetic Field Calculation - Georgia State

    Solenoid. A long straight coil of wire can be used to generate a nearly uniform magnetic field similar to that of a bar magnet. Such coils, called solenoids, have an enormous number of practical applications. The field can be greatly strengthened by the addition of an iron

  • Can Strong Magnetic Fields Affect Humans? - Geekswipe

    2018-08-02  The strongest magnetic field in the universe can be found in the magnetars, which are neutron stars with a magnetic field in the range of 10 6 to 10 11 tesla. Now when you put a human, even in an orbit of 1000 km from the magnetar, the intense magnetic field would do

  • Ferromagnetism: Why Is The Earth Core Magnetic?

    2018-09-08  Iron loses its magnetism when it’s heated to a few hundred degrees, yet Earth’s core – which produces a strong enough magnetic field to hold the planet together – is made of iron that’s so hot it is in a liquid state!

  • Ferromagnetism physics Britannica

    Ferromagnetism is a kind of magnetism that is associated with iron, cobalt, nickel, and some alloys or compounds containing one or more of these elements. It also occurs in gadolinium and a few other rare-earth elements. In contrast to other substances, ferromagnetic materials are magnetized easily, and in strong magnetic fields the magnetization approaches a definite limit called saturation.

  • Is iron magnetic - Answers

    Yes, iron is a magnetic material. It is an element by itself by alloys containing iron would also exhibit varying degrees of magnetism. The other magnetic elements include cobalt and nickel.

  • Ferromagnetism - Georgia State University

    Ferromagnetism Iron, nickel, cobalt and some of the rare earths (gadolinium, dysprosium) exhibit a unique magnetic behavior which is called ferromagnetism because iron (ferrum in Latin) is the most common and most dramatic example. Samarium and neodymium in alloys with cobalt have been used to fabricate very strong rare-earth magnets.

  • What creates Earth's magnetic field? Cosmos

    Magnetic fields around planets behave in the same way as a bar magnet. But at high temperatures, metals lose their magnetic properties. So it’s clear that Earth’s hot iron core isn’t what ...

  • Magnetic Force on Iron Physics Forums

    2009-11-17  I believe the magnetic energy density outside the iron is (1/2μ 0)∫B 2 dV and inside the iron it is (1/2μμ 0)∫B 2 dV so because B is continuous there is very little energy stored inside the iron. But there is a dipole field outside the iron that I have not included. I know there is a thread on this but I cannot find it. Bob S

  • Learn What Metals Are Magnetic and Why - The Balance

    This magnetic field is caused by ferromagnetism and is the strongest form of magnetism. Temporary magnets (also known as soft magnets) are magnetic only while in the presence of a magnetic field. Electromagnets require an electric current to run through their coil wires in order to produce a magnetic field.

  • Exploring Magnetic Fields - Science NetLinks

    This field is what attracts items such as paper clips and nails to the magnet. Although the magnetic field is invisible, the iron filings indicate where it is because they line up with the field. Have students continue with their exploration of magnetic fields, using Exploring Magnetic Fields: Activity 2 student sheet.

  • How to make a magnetic field viewer and cool magnets

    2018-03-23  That would be a mistake. The water is not viscous enough to suspend the iron filings, and it will also rust the iron making your magnetic field viewer have a dirty brown liquid in it. It is a lot easier to see the magnetic field lines if you use a jar that has flat, instead of rounded, sides. While it is a bit of a splurge for the jar we ...

  • Core conundrum: how old is Earth's magnetic field?

    Without its iron core's geodynamo, Earth's magnetic field wouldn't exist. But exactly how long it's been ticking away – and how much heat it's pumping into the mantle – is far from a simple ...

  • Q A: Rusty metal and magnetism Department of

    Rust and corrosion strongly affect the magnetic properties of metals. Ferromagnetic metals like iron in which interactions between the electrons of neighboring atoms tend to make their little bits of magnetism point in the same direction, forming magnetic domains. In a magnetic field, these domains line up with the field making a strong magnet ...

  • Start seeing magnetic fields Evil Mad Scientist

    2010-05-05  Magnetic fields are everywhere– you just can’t see them*. Here we introduce some basic and inexpensive visual tools, as varied as iron filings and Arduino, pre-school toys and OpenGL, for getting to know your local fields. It’s not exhaustive, but might provide you with some useful starting

  • Magnetism for kids - A simple introduction

    2019-10-25  Photo: The magnetic field between the opposite poles of two bar magnets that strongly attract one another. We can't normally see magnetic fields, but if you sprinkle iron filings (tiny bits shaved off an iron bar with a file) onto a piece of paper and hold it above the magnets you can see the field underneath.

  • Transformer and magnetic field/flux through the iron

    The magnetic material is ferromagnetic right? So shouldn't the magnetic field point produced inside the red solenoid force all the other domains to align with it? In other words shouldn't the magnetic field point in the same direction everywhere in the magnetic material (as I have tried to illustrate below) ?