State what is meant by the term magnetic field line.
The diagram shows a cross-section through a wire placed between two magnetic poles.
The wire carries electric current out of the page at Y (indicated by the dot in the center).
The shape of the resulting magnetic field is shown.
State the direction of the circular magnetic field lines immediately surrounding the wire at Y (choose between clockwise or anticlockwise).
State the direction of the magnetic force, F, acting on the wire Y.
Describe the magnetic field in the region inside the dotted rectangle labeled Region R.
