Question

what is difference between permanent magnet and electromagnet .give one example of each

Answer 1

permanent magnets have the magnetic property all the time eg .bar magnet
in electromagnet till the current is flowing it has magnetic properties eg .magnet in bell

Answer 2

1. The strength of a magnetic field of an electromagnet depends on the core material, the number of solenoid windings and the intensity of the current. With a high enough amperage the electromagnet can develop a significantly stronger magnetic field than a permanent magnet.
2. a permanent magnet is 'permanent'. ... An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it. Often an electromagnet is wrapped around a core of ferromagnetic material like steel, which enhances the magnetic field produced by the coil.
3. electromagnets are temporary magnets
4. The Earth, an Alternator, a PM Motor, A Compass, A Horseshoe magnet, a refrigerator magnet, a freezer seal are some example of permanent magnets
5. Electromagnets are used in all kinds of electric devices, including hard disk drives, speakers, motors, and generators, as well as in scrap yards to pick up heavy scrap metal. They're even used in MRI machines, which utilize magnets to take photos of your insides