An insulated copper wire is wound on a soft iron core. Current is passed through the coil such that at end A the current flows anti- clockwise and a magnetic compass needle placed at other end B of the coil. a) What polarity is created at B? b) How is the magnetic compass affected when current flows through the coil?


i) At end B current flows clockwise thus end B becomes the South Pole.
ii) The compass needle will be directed towards the south pole at the end B since current flows in clockwise direction.

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