O-LevelPhysicsWaves5054/22 · Oct/Nov 2023 · Q68 Marks

The loudspeaker shown in Fig. 6.1 produces a sound of frequency 800 Hz. [Figure 6.1]

(a)State what is meant by 'frequency'.[2]
(b)Explain whether the sound produced by the speaker is audible to a human with healthy hearing.[1]
(c)Describe the motion of the cone in Fig. 6.1 and explain how this causes the production of sound.[3]
(d)The Sun is a very large and extremely violent ball of gas. Electromagnetic radiation from explosions on the surface of the Sun reaches the Earth. Explain why sound from explosions on the surface of the Sun does not reach the Earth.[2]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.

[1] (frequency =) the number of wavelengths
[1] (passing a point) per unit time
[1] yes and within audible range (of human with healthy hearing)
[1] it / the loudspeaker / cone / coil is vibrating
[1] when it / cone moves (forwards) it produces a compression / compresses (air) or when it moves (backwards) it produces a rarefaction / expands (air)
[1] vibrations / compressions / rarefactions / energy / change in pressure / motion passed on (to neighbouring air)
[1] space is a vacuum or no medium / air in space
[1] sound cannot travel in a vacuum / space / without a medium

On Oracle Prep you can write or photograph your own answer and have it marked by AI against this mark scheme, with feedback on what you missed.