In a speaker, the magnet generates a stable magnetic field that interacts with an electric current in the coil. This interaction causes the coil to move, driving the speaker cone and producing sound waves.
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Yes, magnets stick primarily to ferromagnetic materials like iron, cobalt, and nickel. These materials have magnetic domains that align with the magnetic field. Non-magnetic materials, such as wood or plastic, do not attract magnets.
No, a magnet with only one pole cannot exist. Magnets always have two poles—north and south—due to the nature of magnetic fields. A single magnetic pole, or monopole, has never been observed.
To make a magnetic compass, magnetize a needle by rubbing it with a magnet, then float the needle on a small piece of cork or paper in water. It will align itself with Earth’s magnetic field.
Yes, the compass needle will show similar behavior when a magnet is brought closer. As a magnet itself, the needle will align with the external magnetic field, showing attraction or repulsion depending on the poles.