All magnets have both a north and a south pole, which causes them to either repel or attract one another depending on how the two poles are lined up. If the north pole of one magnet meets the south pole of another, the two will be attracted, but if either both north or south poles meet, the magnets will repel one another.Know More
No matter what type of magnet, the opposite poles always attract while similar poles always repel. Each magnet sends out a magnetic field, which is positive on one pole and negative on the other. This magnetic field is the result of the movement of negatively charged electrons within the magnet. These fields are strongest directly at the pole, which is why the ends of magnets will so powerfully repel or attract each other.
Magnets are constructed from one of the magnetic metals, such as iron, nickel or cobalt. These materials will always be attracted to a magnet, or they can be magnetized to form a magnet themselves. Steel is another magnetic material, as it is usually constructed mostly of magnetic iron.
To test whether a material is magnetic, it is necessary to use another magnet to see whether or not the two will repel one another.Learn more about Magnetism
In addition to the simple magnets on the refrigerator that hold up photos, coupons or shopping lists, magnets (often electromagnets) are also found in virtually any electric device or appliance with a motor, transformer, relay or solenoid.Full Answer >
Electromagnets are temporary magnets which have a magnetic field only when current passes through them. Some everyday applications of electromagnets include generators, motors, microphones, loudspeakers and cranes. Electromagnets are also used in scientific equipment such as particle accelerators, mass spectrometers and NMR (Nuclear Magnetic Resonance) spectrometers.Full Answer >
Magnetic levitation is a method of supporting an object with the repulsive force of magnets and the stability of servomechanisms. The object is thus suspended in the air, counteracting the effects of gravity.Full Answer >
Magnets that can be made easily from material found at home are called homemade magnets. These are very small and weak magnets. They are primarily for having fun and teaching children about magnetism.Full Answer >