A-LevelPhysicsParticle physicsOct/Nov 2023Paper 1 Q391 Mark
The charge-to-mass ratio r of a particle is given by the equation shown. r = charge on particle / mass of particle The value of r is determined for an α-particle, a β⁺ particle and a proton p. Which list shows the particles in order of increasing magnitude of r from left to right?
Aα → β⁺ → p
Bα → p → β⁺
Cp → α → β⁺
Dp → β⁺ → α
✓ Correct Answer
The correct answer is B: α → p → β⁺
📋 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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