The current I is flowing upward in the wire in this figure. The direction of the magnetic filed due to the current can be determined by the right hand rule.
Can we determine the north and the south of the magnetic field produced by the current I by using a hand rule?
Best Answer
There is no North or South pole in the field around wire. You must understand that the field itself has no poles. Field just consists of field-lines. What we call pole is usually the place when field-lines collide with the physical source of the field (eg. earth, magnet).
But in fact these lines continue even through the source and make elipsoids.
So when you see this:
You must imagine this:
And if you take any field-line of the field, you'll be hardly capable to tell, where the north is.