Right Hand Rules.

Based on Oersted's principals of current and magnetic field, three right hand rules can be applied to help us understand some concepts. Firstly, we must understand that all right-hand rules are based on the concept of conventional current, which is the movement of protons from positive to negative. If electron flow is considered, the same results can be obtained by using the left-hand rule.

Right-hand Rule #1



 Right-hand rule number one states the relationship between the direction of current flow and the direction of the magnetic field generated as a result. Given either one of the variables, the other can be determined.
Taking the above diagram as example, the direction of the thumb pointing at represents the direction of the current. The direction of the fingers holding the conductor therefore represents the direction of the magnetic field.

Right-hand Rule #2
 
 

The right-hand rule explains the concept when a conductor is coiled around a metal, magnetizing the metal.  In this case, the fingers will point to the direction of current flow, and the thumb will reveal the north of the magnet.