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  • Category: Science

    Query about properties of a magnet

    Interested in knowing about the properties of a magnet? Ever wondered why a magnet does not attract steel items? On this page, you can check out the science behind the magnet.

    Which device using a magnet is best suited to judge the direction of an object?
    Generally, we say that a magnet attracts or pulls iron articles. Why it does not attract steel goods? Is this something to do with composition of steel? Which are the magnets used to attract any type of steel items?
  • #141796
    There are many types of steel not every steel will be magnatic. Magnet only attract with big steel because of having higher chromium contents than others. some steel can have their magnatic properties altered significantly by mechanical processing. That means some steal will show little or no response to a magnatic field.

  • #141877
    The question is very difficult to understand. Every magnet will indicate N-S direction because it it the primary property of a magnet. All magnets are made of a group of metals called the ferromagnetic metals. These are metals such as nickel and iron. These are permanent or natural magnets.

    An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of soft ferromagnetic material such as steel, which greatly enhances the magnetic field. Electromagnets are more powerful than natural magnets.

    As electromagnets are more powerful, these can attract iron and steel more powerfully.

    Beware! I question everything and everybody.

  • #142739
    If you want to know the direction of the poles of a magnet simply use a bar magnet of known directions to test this. You can find this by the simple attraction and repelling properties of the magnet. When it comes to why steel or other metals do not get attracted by magnet, I would like to introduce you to classes of magnetic materials.
    They are
    1. Diamagnetism

    2. Paramagnetism

    3. Ferromagnetism

    4. Ferrimagnetism

    5. Antiferromagnetism

    The above mentioned classes are classified on the basis of spin motions of electrons. The spin number of electron decides if the element can act as a magnetic or nonmagnetic. You may know more about these classes by surfing about them on the internet. Coming to the point as to why steel does not get attracted to a magnet the simple answer is that steel is paramagnetic which lacks magnetic properties of attraction and repulsion to a magnet.

  • #142820
    TThis response is marked as DELETED by the admin.


    Poles of a magnet: When a magnet is dipped in iron flings, then maximum flings stick to its ends and almost no flings stick to its center. It means that in magnets, centers of attraction are located near the ends only. Tese centers of attraction near the ends of a magnet, are called poles. Since a magnet has two poles hence it is also called magnetic dipole.
    When this magnet is freely suspended, its two ends point in north and south direction. Te pole near the end pointing towards North (north-seeking end) is called North Pole. Te pole near the end pointing towards South (south-seeking end) is called South Pole. The magnetic poles exert forces on each other. Like poles repel each other, i.e., a north pole will repel another north pole or a south pole will repel another south pole. Unlike poles attract each other, i.e., a south pole will attract a north pole and vice versa. This is the same as in the case of electric charges, like
    charges repel each other and unlike charges attract each other. Te di?erence lies in the fact that electric charges can exist independently whereas magnetic monopoles do not have an independent existence.
    They always occur in pair. Try and separate the two poles of a magnet by cutting it in two parts. Instead of two monopoles you will get another pair of north and south pole.
    Properties of Magnetic Field due to Current

    1. Te magnitude of the magnetic field at a point, produced by the current is directly proportional to magnitude of current Flowing.
    2. Te magnitude of magnetic field by a current decreases as we move away from the current carrying conductor.
    3. Te magnetic field lines in a plane perpendicular to the direction of ?ow of current are in the form of concentric circles.

    Saket Kumar
    Real Eyes Realize Real Lies.

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