Subject: What causes clockwise or counterclockwise magnetic fields?

Reference resources (encyclopedias, etc.) discuss right hand rules but they do 
not discuss left hand rules.  In discussing magnetic fields I'm told that the 
fields move.  Please tell me what kinds of fields rotate clockwise and what 
kinds of fields rotate counterclockwise.  But don't just tell me those bare 
facts.  Tell me WHY some kinds of fields rotate clockwise and others rotate 
counterclockwise relative to the flow of electrons in a conductor.  What 
forces determine field directionality and whether or not motions are clockwise 
or counterclockwise?

Re: What causes clockwise or counterclockwise magnetic fields?