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

Question 4

[Maximum number: 1]

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)

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

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

Question 5

[Maximum number: 1]

We can see light from the Sun but we cannot hear any sound from it.

State the reason for this.

Question 6

[Maximum number: 1]

State the approximate speed of sound in air.
speed =
[Total: 8]

Question 7

[Maximum number: 5]

Describe an experiment to determine the speed of sound in air. State the apparatus you need, details of how to take measurements and how to calculate the speed of sound in air.

You may use the space below to draw a labelled diagram as part of your answer.

Question 8

[Maximum number: 1]

A sound wave travels through air. Fig. 6.1 shows a pressure-time graph for the air at one place.

Fig. 6.1

Fig. 6.1

The sound becomes louder and of lower pitch.

State what happens to:
the amplitude of the sound
the frequency of the sound.

Question 9

[Maximum number: 1]

State the name of the reflection of a sound wave or ultrasound wave.

Question 10

[Maximum number: 1]

Fig. 8.1 shows images produced during two different medical scanning procedures.

Fig. 8.1

Fig. 8.1

Define ultrasound.

Question 11

[Maximum number: 2]

A sound wave travels through air. Fig. 6.1 shows a pressure-time graph for the air at one place.

Fig. 6.1

Fig. 6.1

On Fig. 6.1:
- label one point C to indicate a compression
- label one point R to indicate a rarefaction.

Question 12

[Maximum number: 1]

Fig. 8.1 shows images produced during two different medical scanning procedures.

Fig. 8.1

Fig. 8.1

State how the speed of sound in liquid compares to the speed of sound in air.

Question 13

[Maximum number: 3]

Fig. 8.1 shows images produced during two different medical scanning procedures.

Fig. 8.1

Fig. 8.1

Describe three similarities or differences between the use of ultrasound and X-rays in medical scanning procedures.

1

2

3

All question bank results loaded