If you ever see a wire and need to know where the magnetic field is going:
Electric charges create electric fields. Positive charges spray field lines out; negative charges suck them in.
You can’t have a North Pole without a South Pole. If you break a magnet in half, you just get two smaller magnets. "Magnetic Monopoles" don't exist (as far as we know).
is the "dance" between the two as they travel through space.
Point your in the direction of the current (where the electricity is flowing). Curl your fingers.