what is solenoid
and in which it is used
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A solenoid is a coil of insulated or enameled wire wound on a rod-shaped form made of solid iron, solid steel, or powdered iron. When current flows in the coil, most of the resulting magnetic flux exists within the core material.
They can be used to slow the flow of electricity in a circuit, making them an example of an inductor, or an impedance device.
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a solenoid is an essential coil of wire that is used in electromagnets, inductors, antennas, valves, etc. ... A solenoid is used to control a valve electrically, for example, the solenoid core is used to apply mechanical force to the valve.
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