Question

Name two devices in which electromagnet is used and two devices where permanent magnets are used.

Answer 1

Hint: To answer this question, we first need to understand what electromagnetism is electromagnet. An electromagnet is a magnet whose magnetic field is generated by an electric current. Wire coiled into a coil is used to make electromagnets. A current flowing through the wire produces a magnetic field that is focused in the hole, which serves as the coil's centre.

Complete step-by-step solution:
Permanent magnet - A permanent magnet is an object made of magnetised material that generates its own permanent magnetic field. A refrigerator magnet, for example, is used to keep notes on the refrigerator door. The term ferromagnetic refers to materials that can be magnetised and are also strongly attracted to a magnet. The elements iron, nickel, and cobalt, as well as several rare-earth metal alloys and naturally occurring minerals like lodestone, fall into this category. Despite the fact that ferromagnetic materials are the only ones that are attracted to a magnet strongly enough to be deemed magnetic, all other substances respond to a magnetic field in one of several ways.
So the final answer is that -
Electromagnet-based devices include:
Electric bell
Railway signal
Permanent magnets are used in the following devices:
Speaker
Compass

Note: Magnetization is the vector field in classical electromagnetism that expresses the density of permanent or induced magnetic dipole moments in a magnetic substance. The direction of movement within this area is classified as either Axial or Diametric. The magnetic moments that cause magnetization can be caused by small electric currents caused by electron mobility in atoms, or by the spin of the electrons or nuclei.