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what is solenoid?
A long cylindrical coil of insulated copper wire of large number of circular turns is called a solenoid.A current carrying solenoid behaves like a bar magnet.Polarity of its end can be determined by using clock rule by noting the direction of the flow of current.If the current is anticlockwise,the end is a north pole and the current is clockwise,the end is a south pole.


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