A-LevelPhysicsPhysical quantities and unitsMay/June 2013Paper 1 Q41 Mark
A student carried out an experiment in which an electric current was known to decrease with time. The readings he found, from first to last, were 3.62mA, 2.81mA, 1.13mA, 1.76 mA and 0.90 mA. Which statement could not explain the anomalous 1.13 mA reading?
AHe has reversed the third and fourth readings in the results table.
BHe read the ammeter incorrectly; the reading should have been 2.13mA.
CHe took the current reading at the wrong time.
DThere was a systematic error in the readings from the ammeter.
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of physical quantities and units within the Physicssyllabus. The examiner's mark scheme requires...
📋 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...
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