Physics (AS & A Level) · Oct / Nov 2022 · Paper 52 · Question 2
9702
As printed in the paper
The question as text
A student investigates stationary waves in a vertical tube using the apparatus shown in Fig. 2.1. from signal generator to oscilloscope loudspeaker tube bench stand Fig. 2.1 The student slowly increases the frequency of the signal generator from zero and listens to the sound. The loudness of the sound varies several times between minimum and maximum as the frequency is increased. The lowest frequency giving maximum loudness is identified by n = 1. The next frequencies giving maximum loudness are identified by n = 2, 3, 4, 5 and 6. For each value of n, the student observes the trace on the oscilloscope screen. The student measures the distance d on the screen between two successive crests, as shown in Fig. 2.2. d Fig. 2.2 The student then determines the period T and frequency f of the signal. It is suggested that f and n are related by the equation f = (2n – 1)c 4h where c is the speed of sound in air and h is the height of the tube.
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Show the answer and mark scheme
2(a)[1]
2(b)[2]
2(c)(i)[2]
2(c)(ii)[2]
2(c)(iii)[2]
2(d)[1]
2(e)(i)[2]
2(e)(ii)[1]
2(f)[2]
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