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  2. Current loop - Wikipedia

    en.wikipedia.org/wiki/Current_loop

    These loops are used both for carrying sensor information from field instrumentation and carrying control signals to the process modulating devices, such as a valve. The key advantages of the current loop are: The loop can often power the remote device, with power supplied by the controller, thus removing need for power cabling.

  3. 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).

  4. Magnetic field - Wikipedia

    en.wikipedia.org/wiki/Magnetic_field

    Bending a current-carrying wire into a loop concentrates the magnetic field inside the loop while weakening it outside. Bending a wire into multiple closely spaced loops to form a coil or "solenoid" enhances this effect. A device so formed around an iron core may act as an electromagnet, generating a strong, well-controlled magnetic field. An ...

  5. Magnetic moment - Wikipedia

    en.wikipedia.org/wiki/Magnetic_moment

    Viewing a magnetic dipole as current loop brings out the close connection between magnetic moment and angular momentum. Since the particles creating the current (by rotating around the loop) have charge and mass, both the magnetic moment and the angular momentum increase with the rate of rotation.

  6. 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).

  7. Ampère's force law - Wikipedia

    en.wikipedia.org/wiki/Ampère's_force_law

    Two current-carrying wires attract each other magnetically: The bottom wire has current I 1, which creates magnetic field B 1. 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 ...

  8. Magnetic core - Wikipedia

    en.wikipedia.org/wiki/Magnetic_core

    Magnetic field (green) created by a current-carrying winding (red) in a typical magnetic core transformer or inductor, with the iron core C forming a closed loop, possibly with air gaps G in it. The drawing shows a section through the core. The purpose of the core is to provide a closed high permeability path for the magnetic field lines.

  9. Bitter electromagnet - Wikipedia

    en.wikipedia.org/wiki/Bitter_electromagnet

    Ampère's Law for a basic current carrying loop of wire gives that the on-axis magnetic flux is proportional to the current running through the wire and is related to the basic geometry of the loop, but is not concerned with the geometry of the cross section of the wire. The current density is uniform across the cross-sectional area of a wire.