A-LevelPhysicsWavesOct/Nov 2018Paper 1 Q231 Mark
When a guitar string is plucked, it causes a longitudinal sound wave in the air, as shown. [Figure 23.1] The speed of sound in the air is 340 m s⁻¹. What is the approximate frequency of the sound wave shown?
A430 Hz
B680 Hz
C1100 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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