Compass Alignment with Magnetic Field Lines

Steps:

• Bar magnet field lines emerge from north pole and enter south pole.
• Compass north pole aligns with local field direction, pointing along field lines.
• Analyze given compass orientation to match field direction at each position.
• Position C shows field pointing outward from north pole, matching the compass.

Why C is correct:

• At the axial line beyond the north pole, field lines point away from the north pole (Gauss's law for magnetism: field divergence from N pole).

Why the others are wrong:

• A: Equatorial position shows field parallel to magnet axis, toward south pole.
• B: "S N" indicates needle pointing toward north pole, incorrect for external fields.
• D: Near south pole, field points inward, opposite to given orientation.

Final answer: C