O-LevelPhysicsMagnetismOct/Nov 2023Paper 1 Q371 Mark
A wire is placed at right angles to a uniform magnetic field. There is a current in the wire and it experiences a force. Beams of alpha-particles, beta-particles and neutrons are fired into the magnetic field in the same direction as the conventional current in the wire. Which beams experience a force that is initially in the same direction as the force experienced by the current-carrying wire?
Aalpha-particles (✓)
beta-particles (x)
neutrons (x)
Balpha-particles (✓)
beta-particles (✓)
neutrons (x)
Calpha-particles (x)
beta-particles (✓)
neutrons (✓)
Dalpha-particles (x)
beta-particles (x)
neutrons (x)
✓ Correct Answer
The correct answer is B: alpha-particles (✓) beta-particles (✓) neutrons (x)
📋 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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