What is the purpose of electromagnets?



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    Electromagnets are widely used in many electric devices, including:

        * Motors and generators
        * Relays, including reed relays originally used in telephone exchanges
        * Electric bells
        * Loudspeakers
        * Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks
        * Particle accelerators
        * Magnetic locks
        * Magnetic separation of materials
        * Industrial lifting magnets
        * Electromagnetic suspension used for MAGLEV trains

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