Physics (AS & A Level) · Feb / March 2023 · Paper 52 · Question 2
9702
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The question as text
A student investigates standing waves in water. A sound source is placed at the bottom of a cylinder containing water. A microphone, attached to a rod, is placed above the sound source, as shown in Fig. 2.1. bench to signal generator rod to oscilloscope water microphone sound source Fig. 2.1 The sound source is connected to a signal generator. The microphone is connected to an oscilloscope. The signal generator is set to a frequency f. The microphone is moved up away from the sound source until the maximum amplitude is observed on the oscilloscope screen. The distance d1 between the microphone and sound source is measured. The microphone is moved up a further 2.0 cm. The microphone is then moved down until the maximum amplitude is observed on the oscilloscope screen. A second value d2 is measured. The average value of d is calculated. The experiment is repeated for different values of f. It is suggested that f and d are related by the equation v f = 4 (d + k) where v is the speed of sound in water and k is a constant. 1
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2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(c)(iv)[2]
2(d)[3]
2(e)[1]
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