The north-south polarities of an electromagnet can be found easily by using:

The magnetic inside a long straight solenoid carrying current :

Which of the following correctly describes the magnetic field near a long straight wire?

The direction of current in the coil at one end of an electromagnet is clockwise. This end of the electromagnet will be:

If the direction of electric current in a solenoid when viewed from a particular end is anticlockwise, then this end of solenoid will be: