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  2. Electromagnetic coil - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_coil

    Sensor or pickup coils - these are used to detect external time-varying magnetic fields; Inductive sensor - a coil which senses when a magnet or iron object passes near it; Recording head - a coil which is used to create a magnetic field to write data to a magnetic storage medium, such as magnetic tape, or a hard disk. Conversely it is also ...

  3. Coil winding technology - Wikipedia

    en.wikipedia.org/wiki/Coil_winding_technology

    In electrical engineering, coil winding is the manufacture of electromagnetic coils. Coils are used as components of circuits, and to provide the magnetic field of motors, transformers, and generators, and in the manufacture of loudspeakers and microphones. The shape and dimensions of a winding are designed to fulfill the particular purpose.

  4. Template:Calendar - Wikipedia

    en.wikipedia.org/wiki/Template:Calendar

    Display a year or month calendar Template parameters [Edit template data] Parameter Description Type Status Year year the ordinal year number of the calendar Default current Number suggested Month month whether to display a single month instead of a whole year, and which one Default empty Example current, next, last, 1, January String suggested Show year show_year whether to display the year ...

  5. Electromagnet - Wikipedia

    en.wikipedia.org/wiki/Electromagnet

    An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. Electromagnets usually consist of wire (likely copper) wound into a coil. A current through the wire creates a magnetic field which is concentrated along the center of the coil. The magnetic field disappears when the current is turned off.

  6. Field coil - Wikipedia

    en.wikipedia.org/wiki/Field_coil

    A field coil is an electromagnet used to generate a magnetic field in an electro-magnetic machine, typically a rotating electrical machine such as a motor or generator. It consists of a coil of wire through which the field current flows. In a rotating machine, the field coils are wound on an iron magnetic core which

  7. Maxwell coil - Wikipedia

    en.wikipedia.org/wiki/Maxwell_coil

    A gradient-field Maxwell coil has essentially the same geometry of the 3-coil configuration above, but the central coil is removed to leave only the smaller two coils, and the current in one of these is reversed. [3] This produces a uniform-gradient magnetic field near the centre of the two coils.