A magnet, consisting of a solenoid with an iron core, which has a magnetic field existing only during the time of current flow through the coil
A core of magnetic material surrounded by a coil of wire through which an electric current is passed to magnetize the core
a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet
(MRI) A magnet which is magnetized by a current-carrying coil round it These can produce much larger magnetic field than permanent magnets
A soft iron core surrounded by a coil of wire that temporarily becomes a magnet when an electric current flows through the wire
A device consisting of a ferromagnetic core and a coil that produces appreciable magnetic effects only when an electric current exists in the coil
A coil of wire wound about a magnetic material, such as iron, that produces a magnetic field when current flows through the wire
The metal is generally in the form of a bar, either straight, or bent into the shape of a horseshoe
an electrically excited magnet capable of exerting mechanical force or performing mechanical work
A coil of wire, usually wound on an iron core, which produces a strong magnet field when current is sent through the coil
A magnet consisting of a solenoid with an iron core, which has a magnetic field existing --unlike a permanent magnet--only during the time of current flow through the solenoid NOTE 2: The demagnetization curve is usually plotted to the left of the vertical axis (negative values of Hd) and the energy product curve to the right
A mass, usually of soft iron, but sometimes of some other magnetic metal, as nickel or cobalt, rendered temporarily magnetic by being placed within a coil of wire through which a current of electricity is passing
A magnet with a coil of wire that has a current passing through it The magnetic field can be made stronger by coiling the wire around an iron core
A device that consists of a coil of wire, usually wound on a soft iron core It attracts magnetic objects when a current passes through the coil
A device consisting of a current- carrying coil, usually with an iron core, used to produce a magnetic field
A magnet produced by placing a coil of wire around a steel or iron bar When current flows through the coil the bar becomes magnetized and will remain so as long as the current continues to flow
A device made of wire coils that produces a magnetic field when electricity flows through the coils
An electromagnet is a magnet that consists of a piece of iron or steel surrounded by a coil. The metal becomes magnetic when an electric current is passed through the coil. a piece of metal that becomes magnetic (=able to attract metal objects) when an electric current is turned on. Device consisting of a core of magnetic material such as iron, surrounded by a coil through which an electric current is passed to magnetize the core. When the current is stopped, the core is no longer magnetized. Electromagnets are particularly useful wherever controllable magnets are required, as in devices in which the magnetic field is to be varied, reversed, or switched on and off. Suitably designed magnets can lift many times their own weight and are used in steelworks and scrap yards to lift loads of metal. Other devices that utilize electromagnets include particle accelerators, telephone receivers, loudspeakers, and televisions
A device made of a core of iron or steel wrapped in a wire coil, which attracts other ferrous metals when current is passed through the wire
Made by winding coil of wire around soft iron core, When electric current is run through wire, coil becomes a magnet
Magnet with a field produced by electric current; usually in the form of a wire coiled around a piece of iron
A temporary magnet consisting of a set of coils wound on an iron core The device becomes magnetic when electricity is passed through the coils
a magnet which has been given increased magnetic properties by passing a conductor (wires, in which a current is flowing), through its magnetic field
A coil of wire that is wrapped around a soft iron core that is magnetized when electric current flows through it
A magnet in which the magnetic field is produced by an electric current passing through a coil of wire wound upon a soft iron core
a strong temporary magnet made of a coiled wire (through which an electrical current is passed) around a metal core