what do you mean by solenoid?
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A solenoid behaves like a bar magnet when current is passed through it. Like in bar magnet, the field lines emerge from one end and merge into another. In a solenoid, the field lines behave in the same manner. One end of Solenoid behaves as Magnetic North Pole. and Other end as Magnetic South Pole
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a coil of wire usually in cylindrical form that when carrying a current acts like a magnet so that a movable core is drawn into the coil when a current flows and that is used especially as a switch or control for a mechanical device (such as a valve)..
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