O-LevelPhysicsMagnetismOct/Nov 2025Paper 1 Q261 Mark
A bar magnet is placed on a sheet of paper. The diagram shows the field lines due to the magnet. A soft-iron bar is placed on the paper on the rectangle marked WZ. The soft-iron bar becomes an induced magnet. What are the magnetic poles at the ends of the soft-iron bar?
Apole at W
N
pole at Z
N
Bpole at W
N
pole at Z
S
Cpole at W
S
pole at Z
N
Dpole at W
S
pole at Z
S
✓ Correct Answer
The correct answer is B: pole at W N pole at Z S
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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