A-LevelPhysicsPhysical quantities and unitsOct/Nov 2011Paper 1 Q51 Mark
The speedometer in a car consists of a pointer which rotates. The pointer is situated several millimetres from a calibrated scale. What could cause a random error in the driver's measurement of the car's speed?
AThe car's speed is affected by the wind direction.
BThe driver's eye is not always in the same position in relation to the pointer.
CThe speedometer does not read zero when the car is at rest.
DThe speedometer reads 10% higher than the car's actual speed.
✓ Correct Answer
The correct answer is B. 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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