2026 · Q55
With regard to the magnetic field lines, which one among the following statements is NOT correct?
General KnowledgePhysics
- AThey are always parallel to each other
- BThey point from south pole to north pole inside bar magnets
- CThey can cross each other inside bar magnets
- DThe larger the line density in a region, the larger is the magnetic field in that region
Explanation
Magnetic field lines form closed curved loops (outside a bar magnet from north to south, inside from south to north); they are parallel to each other only in a uniform magnetic field, so statement (A), as a universal claim, is NOT correct. Note: the question is disputed because (C) is also incorrect - field lines never cross each other anywhere, including inside bar magnets - so two options qualify as 'NOT correct'. The stored key (A) is retained with this caveat; verification is inconclusive.