6. What is an electromagnet? State its one practical use.
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A soft metal core made into a magnet by the passage of electric current through a coil surrounding it called ElectroMagnet .
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!
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electromagnet is a device which can be made by coiliing wire on a soft iron core by passing electric current through it .
It can be use in loudspeaker, electric bell
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