A-LevelPhysicsWavesOct/Nov 2019Paper 1 Q211 Mark
The two graphs represent the same wave. Graph 1 shows the variation with time of the displacement at a particular distance. Graph 2 shows the variation with distance of the displacement at one instant. [Figure showing Graph 1 (displacement vs time, period 1.0 s) and Graph 2 (displacement vs distance, wavelength 90 cm)] What is the speed of the wave?
A22.5 cm s⁻¹
B30.0 cm s⁻¹
C90.0 cm s⁻¹
D120 cm s⁻¹
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The correct answer is D. 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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