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.
Tiwari Academy Discussion Latest Questions
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.
Placing a piece of wood between the compass needle and the magnet will not affect the compass needle’s deflection. Wood is non-magnetic and does not interfere with the magnetic field or the compass needle.
To keep magnets safe, store them with keepers (soft iron bars) across poles to prevent demagnetization. Avoid dropping, heating, or placing them near electronic devices, and keep them dry to prevent rusting.
Different magnets lift varying numbers of pins due to differences in their magnetic strength, size, and material composition. Stronger magnets have a more intense magnetic field, enabling them to attract and hold more pins.
To prevent screws from falling, the mechanic can magnetize the screwdriver by rubbing it against a magnet several times in one direction. The magnetized screwdriver will then attract the steel screws, holding them in place.
Yes, the compass needle’s north pole points towards the Earth’s geographic north, indicating that the Earth’s magnetic south pole is near the geographic north. Thus, the Earth’s magnetic north pole is near the geographic south.