Magnetic lines of force - The magnetic lines of force, in a bar magnet will be such that the lines of force outside the magnet will be from North to South ; and inside the magnet will be from South to North as indicated in the figure

Right hand thumb rule – The right hand thumb rule as indicated in the figure above.  If a current carrying conductor is imagined to be held in right hand such that thumb points in direction of current, then curled fingers of hand indicate the direction of magnetic field. If the current flows in upward direction then direction of the magnetic field will be anticlockwise.

If the current flows in the downward direction then the direction of the magnetic field will be clockwise

The magnetic lines of force, in a bar magnet will be such that the lines of force outside the magnet will be from North to South ; and inside the magnet will be from South to North.

The right hand rule only talks about the magnetic field direction; it does not go deep in giving the North and South poles of the magnetic field. We are more interested in whether it is a clockwise field or an anticlockwise field around the copper wire.