what is solenoid ? pls tell me the answer
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A solenoid is a coil of insulated wire wound on a rod-shaped form made of solid iron, solid steel, or powdered iron which produces magnetic field when electric current passed through it. It is a electromechanical device. Devices of this kind can be used as electromagnets, as inductors in electronic circuits etc.
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Magnetism of an electromagnet only lasts as long as the current passes through its coil. The cylindrical coil consisting of a large number of turns of insulated wire is called a solenoid.
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