CAIE IGCSE Physics 3.4 Sound Topic Practice

CourseCourseConceptConceptDocumentDocument

Covered syllabus points

3.4.1—Production of sound by vibrating3.4.2—Longitudinal nature of sound waves3.4.3—Approximate range of frequencies3.4.4—A medium is needed to transmit sound3.4.5—Speed of sound in air is approximately3.4.6—Method involving a measurement of3.4.7—Changes in amplitude and frequency3.4.8—An echo as the reflection of sound3.4.9—Ultrasound as sound with a frequency3.4.10—Compression and rarefaction3.4.11—That, in general, sound travels faster3.4.12—Uses of ultrasound in non- destructive

Question 1

[Maximum number: 3]

Fig. 4.1 shows a loudspeaker that is producing a sound wave in air of frequency 15000 Hz .

Fig. 4.1

Fig. 4.1

Describe how the cone of the loudspeaker produces this sound.

Question 2

[Maximum number: 5]

Fig. 6.1 represents a sound wave of wavelength 0.45 m travelling from left to right.

Fig. 6.1 (not to scale)

Fig. 6.1 (not to scale)

Question (a)

(a)

On Fig. 6.1:

[ 2 ]

Question (i)

(i)

at the centre of a compression, mark a cross and label it C

[ 1 ]

Question (ii)

(ii)

at the centre of a rarefaction, mark a cross and label it R

[ 1 ]

Question (b)

(b)

Suggest a medium through which the sound wave is travelling and state your reasoning.
medium
reason

[ 1 ]

Question (c)

(c)

Another type of wave that consists of compressions and rarefactions is ultrasound.

[ 2 ]

Question (i)

(i)

State one other similarity between sound of frequency 750 Hz and ultrasound.

[ 1 ]

Question (ii)

(ii)

State one way in which sound of frequency 750 Hz is different from ultrasound.

[ 1 ]

Question 3

[Maximum number: 1]

A healthy human ear is able to hear a range of frequencies.
What is this approximate range?

A

10 Hz to 1000 Hz

B

20 Hz to 2000 Hz

C

20 Hz to 20000 Hz

D

200 Hz to 200000 Hz

All question bank results loaded