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 is 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?
a) From the above observations, the polarity created at B is south.
b) The north pole of the compass points to the end A when it is placed near the solenoid.