Physics for IGCSE & O level - Waves And Sounds (Section 2)
1
What wave phenomenon is demonstrated when a wave passes through a narrow opening?
إجابة
(C)
Diffraction
2
Which of the following are uses of echos in the world?
إجابة
A
B
C
3
Which of the following are uses of ultrasound?
إجابة
A
B
C
4
What type of wave is light?
إجابة
(B)
Transverse
5
What are the repeating patterns in a wave represented by?
إجابة
(B)
Wavelength
6
The human ear can detect sounds up to a frequency of about:
إجابة
(B)
20 kHz
7
What can ultrasound be used for in the medical field?
إجابة
A
C
8
Which type of wave is a sound wave?
إجابة
(B)
Longitudinal wave
9
Which is a use of ultrasound?
إجابة
A
B
C
D
10
What does ultrasound help to distinguish?
إجابة
(B)
Different layers of soft tissue
11
What is an example of the reflection of sound waves?
إجابة
(B)
An echo
12
What unit is the speed of sound often measured in?
إجابة
(B)
Meters per second (m/s)
13
Which term describes the maximum displacement of a wave from its rest position?
إجابة
(B)
Amplitude
14
Which of the following is a characteristic of sound waves?
إجابة
B
C
D
15
What determines the loudness of a sound?
إجابة
(C)
Amplitude
16
What is the formula that links speed, frequency and wavelength?
إجابة
(C)
Speed = Frequency x Wavelength
17
What type of wave is a sound wave?
إجابة
B
D
18
What does the term 'ultrasound' refer to in terms of frequency?
إجابة
(C)
Frequencies above 20 kHz
19
Which of the following is an application of the echo-sounding principle?
إجابة
A
B
C
20
What is ultrasound?
إجابة
(C)
Sound waves with a frequency above the human hearing range.
21
In the metal testing, what feature of the ultrasound wave changes when it reaches a flaw (tiny gap)?
إجابة
(A)
Amplitude
22
How is the energy carried by a wave related to its amplitude?
إجابة
(B)
Energy is proportional to the square of the amplitude.
23
Why is ultrasound used for cleaning delicate machinery?
إجابة
(B)
It uses vibrations to dislodge dirt.
24
What is one practical application of sonar?
إجابة
(B)
Measuring the depth of the ocean
25
Which of the following best describes how sound travels?
إجابة
(B)
Through vibrations of particles in a medium.
26
What is the relationship between wavelength and frequency?
إجابة
(B)
Inversely proportional
27
Which of the following best describes diffraction?
إجابة
(A)
The bending of a wave around an obstacle.
28
What is the difference between transverse and longitudinal waves?
إجابة
A
B
29
How is the pitch of a sound related to the frequency?
إجابة
(A)
Higher frequency = higher pitch
30
What does the term 'period' represent in the context of waves?
إجابة
(B)
The time for one complete wave cycle.
31
What does the Doppler effect cause to sound waves when the source is moving toward you?
إجابة
(B)
Higher frequency, higher pitch
32
Why is ultrasound preferred over X-rays in some medical applications?
إجابة
(D)
Ultrasound can distinguish between different layers of soft tissue.
33
What happens to the loudness of a sound if the amplitude is increased?
إجابة
(C)
It increases
34
What is the term for the time it takes for one complete cycle of a wave?
إجابة
(D)
Period
35
What is a characteristic of a transverse wave?
إجابة
(B)
The particles of the medium move perpendicular to the wave's direction.
36
In the context of ultrasound, what is the depth of water if the pulse takes 0.1 seconds to travel to the sea-bed and return, and the speed of sound in water is 1400 m/s?
إجابة
(A)
70 m
37
What happens to the energy of a wave when its amplitude increases?
إجابة
(B)
The energy increases.
38
What does the amplitude of a sound wave determine?
إجابة
(B)
The loudness of the sound.
39
Which of the following is NOT listed under 'Waves and sounds'?
إجابة
(D)
Gravity
40
What are the two main types of mechanical waves?
إجابة
A
B
41
What type of waves are ultrasound waves?
إجابة
(C)
Longitudinal
42
Which is an example of wave interference?
إجابة
(C)
A loud sound from two speakers
43
What happens to the wavelength if the frequency of a sound increases, assuming the speed of sound remains constant?
إجابة
(B)
It decreases.
44
If a boat uses ultrasound and pulses take 0.02 seconds to travel from the boat to the seabed and back, what is the water depth (assuming the speed of sound is 1400 m/s)?
إجابة
(B)
14 m
45
If the frequency of a sound wave is 110 Hz and the wavelength is 3 m, what is the speed of the wave?
إجابة
(C)
330 m/s
46
In metal testing using the echo-sounding principle, what does a flaw (tiny gap) result in?
إجابة
(B)
Two reflected pulses
47
What is one industrial use of ultrasonic waves?
إجابة
(D)
All of the above
48
What is the unit for measuring the loudness of sound?
إجابة
(C)
Decibel (dB)
49
How does increasing the air temperature affect the speed of sound?
إجابة
(B)
It increases the speed.
50
What term describes the bending of a wave when it passes from one medium to another?
