A-LevelPhysicsPhysical quantities and unitsMay/June 2016Paper 1 Q41 Mark
The diagram shows a cathode-ray oscilloscope (c.r.o.) being used to measure the rate of rotation of a flywheel. [Figure 4.1] The flywheel has a small magnet M mounted on it. Each time the magnet passes the coil, a voltage pulse is generated, which is passed to the c.r.o. The display of the c.r.o. is 10 cm wide. The flywheel is rotating at 3000 revolutions per minute. Which time-base setting will display clearly separate pulses on the screen?
A1 s cm⁻¹
B10 ms cm⁻¹
C100 µs cm⁻¹
D1 µs cm⁻¹
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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...
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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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