what is solenoid in about 5lines
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A solenoid is a coil wound into a tightly packed helix. In physics, the term solenoid refers to a long, thin loop of wire, often wrapped around a metallic core, which produces a magnetic field when an electric current is passed through it.
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solenoid. noun. A current-carrying coil of wire that acts like a magnet when a current passes through it. An assembly used as a switch, consisting of a coil and a metal core free to slide along the coil axis under the influence of the magnetic field.
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