AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
(B) From south pole to north pole
Inside a bar magnet, the direction of field lines is from its south pole to its north pole.
The textbook explicitly states: "Inside the magnet, the direction of field lines is from its south pole to its north pole." Outside the magnet, field lines go from north to south — a common trap. Remember: field lines form closed curves, so they must return from south to north inside the magnet.
Source: Chapter 12, Section 12.1 (Magnetic Field and Field Lines)