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  2. Magnetic field - Wikipedia

    en.wikipedia.org/wiki/Magnetic_field

    Magnetic field lines form in concentric circles around a cylindrical current-carrying conductor, such as a length of wire. The direction of such a magnetic field can be determined by using the "right-hand grip rule" (see figure at right). The strength of the magnetic field decreases with distance from the wire.

  3. Oersted's law - Wikipedia

    en.wikipedia.org/wiki/Oersted's_law

    The magnetic field (marked B, indicated by red field lines) around wire carrying an electric current (marked I) Compass and wire apparatus showing Ørsted's experiment (video [1]) In electromagnetism , Ørsted's law , also spelled Oersted's law , is the physical law stating that an electric current induces a magnetic field .

  4. Lorentz force - Wikipedia

    en.wikipedia.org/wiki/Lorentz_force

    The magnetic force component of the Lorentz force manifests itself as the force that acts on a current-carrying wire in a magnetic field. In that context, it is also called the Laplace force . The Lorentz force is a force exerted by the electromagnetic field on the charged particle, that is, it is the rate at which linear momentum is ...

  5. Electromagnetic coil - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_coil

    The magnetic field lines (green) of a current-carrying loop of wire pass through the center of the loop, concentrating the field there. An electromagnetic coil is an electrical conductor such as a wire in the shape of a coil (spiral or helix).

  6. Ampère's force law - Wikipedia

    en.wikipedia.org/wiki/Ampère's_force_law

    The top wire carries a current I 2 through the magnetic field B 1, so (by the Lorentz force) the wire experiences a force F 12. (Not shown is the simultaneous process where the top wire makes a magnetic field which results in a force on the bottom wire.) In magnetostatics, the force of attraction or repulsion between two current-carrying wires ...

  7. Electromagnet - Wikipedia

    en.wikipedia.org/wiki/Electromagnet

    The magnetic field lines of a current-carrying loop of wire pass through the center of the loop, concentrating the field there The magnetic field generated by passing a current through a coil. An electric current flowing in a wire creates a magnetic field around the wire, due to Ampere's law (see drawing of wire with magnetic field).

  8. Proximity effect (electromagnetism) - Wikipedia

    en.wikipedia.org/wiki/Proximity_effect...

    The coil is limited to a single layer, and the turns are spaced apart to avoid having parallel wires carrying the same current near each other. In electromagnetics, proximity effect is a redistribution of electric current occurring in nearby parallel electrical conductors carrying alternating current (AC), caused by magnetic effects. In ...

  9. Oersted - Wikipedia

    en.wikipedia.org/wiki/Oersted

    The unit was established by the IEC in the 1930s [4] in honour of Danish physicist Hans Christian Ørsted.Ørsted discovered the connection between magnetism and electric current when a magnetic field produced by a current-carrying copper bar deflected a magnetised needle during a lecture demonstration.