Definition of electromagnet in English:



  • A soft metal core made into a magnet by the passage of electric current through a coil surrounding it.

    • ‘In the simplest case, the wires carrying the electrical signals are used to form an electromagnet which attracts and releases a metal diaphragm.’
    • ‘It is this small magnetic field that is the basis of an electromagnet.’
    • ‘Modern circular accelerators place klystrons and electromagnets around a circular copper tube to speed up particles.’
    • ‘Plus, he says, their carbon cores could make them stronger than steel, so an electromagnet made from the wires wouldn't need a heavy structure to support it.’
    • ‘Magnets, either conventional electromagnets or superconducting magnets, are placed along the accelerator tube at regular intervals.’
    • ‘Other rhenium alloys are used in making temperature control devices, such as thermostats; vacuum tubes, like those in a television set; and electromagnets, electrical contacts, and thermocouples.’
    • ‘Finally, after calibration of the apparatus, the force acting on the particle can be determined by measuring the currents driving the electromagnets.’
    • ‘As early as 1826 the inventor of the electromagnet William Sturgeon had tried to open pallets with his invention.’
    • ‘A power supply for applying a voltage to a scanning electromagnet for deflecting a charged particle beam has a first power supply unit having no filter and a second power supply unit having a filter.’
    • ‘It is also used for magnetic poles of electromagnets.’
    • ‘By experimenting with magnets and electromagnets it was learnt how a motor is turned by electricity.’
    • ‘They mounted two flat, semicircular metal chambers between the faces of a powerful electromagnet.’
    • ‘During braking, the metal wheels are exposed to a magnetic field from an electromagnet, generating eddy currents in the wheels.’
    • ‘In order to generate a magnetic field that can be said to propagate, it is necessary to produce a changing field by turning on an electromagnet or removing a magnet from a magnetic shield such as a superconducting box.’
    • ‘What difference does voltage make in the strength of an electromagnet?’
    • ‘When cooled to extremely low temperatures, electromagnets demonstrate an unusual behavior: For the first few nanoseconds after electricity is applied to them, they vibrate.’
    • ‘The mass acted upon by the coil elements can be a permanent magnet or magnets, or electromagnets.’
    • ‘If you are having trouble finding a magnet around the house, two possible sources include a can opener and an electromagnet that you make yourself.’
    • ‘As these charged particles swirl, they generate magnetic fields just the way electrons moving in an electromagnet's coiled wire do.’
    • ‘This, for instance, is how we ordinarily think of the magnetic field of an electromagnet, which is sustained only so long as an electric current passes through the magnet's coils.’
    lodestone, magnetite
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