A-LevelPhysicsWavesMay/June 2014Paper 1 Q231 Mark
A sound wave consists of a series of moving pressure variations from the normal, constant air pressure. The graph shows these pressure variations for two waves at one instant in time. [Figure 23.1] Wave 1 has an intensity of 1.6 × 10⁻⁶ W m⁻². What is the intensity of wave 2?
A2.4 × 10⁻⁶ W m⁻²
B3.0 × 10⁻⁶ W m⁻²
C3.6 × 10⁻⁶ W m⁻²
D4.5 × 10⁻⁶ W m⁻²
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The correct answer is C. This question tests the candidate's understanding of waves 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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