![]() ![]() Besides creating magnetic fields, Helmholtz coils are also used in scientific apparatus to cancel external magnetic fields, such as the Earth's magnetic field. It consists of two electromagnets on the same axis, carrying an equal electric current in the same direction. Two circular coil device which creates a homogeneous magnetic field A Helmholtz coil Helmholtz coil schematic drawingĪ Helmholtz coil is a device for producing a region of nearly uniform magnetic field, named after the German physicist Hermann von Helmholtz.
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