The diagram shows the cross-section of a progressive transverse wave travelling at 24 cm s⁻¹ on water - AQA - A-Level Physics - Question 16 - 2020 - Paper 1
Question 16
The diagram shows the cross-section of a progressive transverse wave travelling at 24 cm s⁻¹ on water. The amplitude of the wave is 2.0 cm and the frequency is 4.0 H... show full transcript
Worked Solution & Example Answer:The diagram shows the cross-section of a progressive transverse wave travelling at 24 cm s⁻¹ on water - AQA - A-Level Physics - Question 16 - 2020 - Paper 1
Step 1
A The phase difference between particles at P and S is $\frac{\pi}{2}$ rad.
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Answer
This statement is incorrect. Since P and S are half a wavelength apart, the phase difference should be rac{\pi}{2} rad, as half a wavelength corresponds to a phase difference of rac{\pi}{2}.
Step 2
B The distance between P and R is 6.0 cm.
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Answer
This statement is incorrect. The distance between P and R is equivalent to one wavelength, which is λ=24cm/s⋅4Hz1=6cm.
Step 3
C The particle velocity at Q is a maximum.
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Answer
This statement is correct. In a transverse wave, the particle velocity is maximum at the equilibrium position, which corresponds to point Q on the wave.
Step 4
D Particles at P and R are in phase.
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Answer
This statement is incorrect. Since P and R are separated by half a wavelength, they are out of phase by rac{\pi}{2} rad.
