A-LevelPhysicsWavesMay/June 2010Paper 1 Q51 Mark
The diagram shows a square-wave trace on the screen of a cathode-ray oscilloscope. A grid of 1 cm squares covers the screen. The time-base setting is 10 ms cm⁻¹. [Figure 5.1] What is the approximate frequency of the square wave?
A70 Hz
B140 Hz
C280 Hz
D1400 Hz
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of waves 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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