what is solenoid?in detail.
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Explanation:
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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Solenoid is a long circular coil of insulated copper wire whose length is greater than the area of it’a cross-section.
When a piece of soft iron core is kept in the solenoid, it is called an electromagnet since the iron core gets magnetised when electric current flows through the solenoid.
These are widely used in water-pressure valves, MRIs , etc.
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