Like poles repel and unlike poles attract. The tangent to the field line at any point represents the direction of the net magnetic field B at that point. Your email address will not be published. They have useful applications in many fields, but can cause fatal injury if not handled properly. Actually, the poles are not at the ends of the geometric length of the magnet but they are slightly inside. The lines show where the magnetic field leaves the magnet at one pole and reenters at the opposite pole along the length of the magnet. Like poles repel and unlike poles attract. Observe the pattern in which the filings arrange themselves, representing the magnetic lines of force. The magnetic field lines of a magnet form continuous closed loops. You also have the option to opt-out of these cookies. Glass Encased Magnetic Stir Bars, Telfon Glass Covered Magnetic Stirring Bar, PTFE Magnetic Stirrers Glass Stir Bars, Spinbar Round Pyrex Glass Coated Magnetic Stir Bar, Glass encapsulated Alnico magnet stirring bars Glass Magnetic Stir Bar is perfect for mixing solutions that would likely stain PTFE magnetic stirrers, glass stir bars are sure not to stain, keeping its inert properties, all […] Anything that is magnetic, like a bar magnet or a loop of electric current, has a magnetic moment. 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Bar magnets are used as stirrers in laboratory for magnetic experiments. But this is outside the bar magnet. The larger the number of field lines crossing per unit area, the stronger is the magnitude of the magnetic field B. A bar magnet has properties similar to any permanent magnet. 8.6k views. They are permanent magnets, i.e., they keep their magnetism even when removed from a magnetic field. So let's list down some more important properties of these magnetic field lines. Properties of magnetic flux Hence, this can serve as a makeshift compass. These magnets are also used in devices such as telephones, radios, and television sets.