A-LevelPhysicsElectric fieldsFeb/Mar 2018Paper 1 Q301 Mark
An electron passes into the space between two parallel plates that are 5.0 cm apart and which are maintained at electric potentials of +2000 V and –500 V, respectively. [Figure 30.1] What is the electric force on the electron?
A1.6 x 10⁻¹⁵ N
B4.8 × 10⁻¹⁵ N
C6.4 × 10⁻¹⁵ N
D8.0 × 10⁻¹⁵ N
✓ Correct Answer
The correct answer is D: 8.0 × 10⁻¹⁵ N
📋 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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