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WorksheetsO-NET Physics Exam Questions
Total questions: 100
Worksheet time: 2hrs 33mins
When a wave travels from deep water to shallow water, which of the following is true?
The wave speed in deep water is less than in shallow water.
The wavelength in deep water is greater than in shallow water.
The frequency in deep water is greater than in shallow water.
The frequency in deep water is less than in shallow water.
Which of the following waves requires a medium to propagate?
Light wave
Sound wave
Surface water wave
If a guitar string is plucked and the sound heard is lower than normal, how can the pitch be raised?
Use a thicker string.
Loosen the string.
Adjust the string length to be longer.
Tighten the string.
The sound passes through a window at a right angle, what is the intensity of the sound that passes through?
What is the sound power passing through a window with an average sound intensity of 1.0 x 10^-4 watts per square meter, with a window width of 80 cm and height of 150 cm?
0.8 x 10^-4 W
1.2 x 10^-4 W
1.5 x 10^-4 W
8.0 x 10^-4 W
A fisherman sends sonar waves to a school of fish and finds that the time it takes for the waves to travel from the transmitter to the receiver is exactly 1.0 seconds. How far are the fish from the boat, given that the speed of the waves in water is 1,540 meters/second?
260 m
520 m
770 m
1,540 m
What is the wavelength difference between two radio waves transmitted from two radio stations with frequencies of 90 MHz and 100 MHz?
3.33 m
3.00 m
0.33 m
0.16 m
Which of the following is the correct order of electromagnetic waves from shortest to longest wavelength?
Which of the following is the correct order of electromagnetic waves from shortest to longest wavelength?
X-rays, Infrared, Microwave
Infrared, Microwave, X-rays
X-rays, Microwave, Infrared
Microwave, Infrared, X-rays
What will be the characteristics of radio waves when modulating audio signals in AM radio systems?
Radio waves will change amplitude according to the amplitude of the audio wave
Radio waves will change amplitude according to the frequency of the audio wave
Radio waves will change frequency according to the amplitude of the audio wave
Radio waves will change frequency according to the frequency of the audio wave
What is the most convenient way for two astronauts on the moon to communicate?
Ordinary sound waves
Ultrasound waves
Radio waves
Sonar waves
When a wave moves from one medium to another and its speed decreases, what happens?
When a wave moves from one medium to another and the speed of the wave decreases, which statement is correct for the wave in the second medium?
Frequency increases
Frequency decreases
Wavelength increases
Wavelength decreases
Which electromagnetic wave is commonly used in remote controls for televisions?
Infrared
Microwave
Radio wave
Ultraviolet
The level and quality of sound depend on which property?
Frequency, waveform
Waveform, frequency
Amplitude, frequency
Frequency, amplitude
If a water wave is rhythmic, how will a ping pong ball floating away move?
The ping pong ball moves further away
The ping pong ball moves closer
The ping pong ball moves up and down at the same position
The ping pong ball moves sideways
Which of the following is the purpose of sound-absorbing materials in a movie theater?
Which of the following is the objective of soundproofing a movie theater with sound-absorbing materials?
Reduce the frequency of sound
Reduce the loudness of sound
Reduce sound reflection
Reduce sound refraction
Which quantity does not change when a wave moves from one medium to another?
Frequency
Wavelength
Speed
Direction of wave motion
When comparing the sound of a guitar with a standard tuning fork, if the guitar string is plucked and beats occur at a certain frequency, what is the original frequency of the guitar sound?
Higher than the standard sound
Lower than the standard sound
Equal to the standard sound
Could be higher or lower than the standard sound
When red light passes through a prism, how does the speed and wavelength of red light in the prism compare to that of light in air?
Speed decreases, wavelength increases
Speed increases, wavelength decreases
Both speed and wavelength decrease
Both speed and wavelength increase
When red light passes through a prism, how does the speed and wavelength of red light in the prism compare to that light in the air?
Speed decreases, wavelength increases
Speed decreases, wavelength decreases
Speed increases, wavelength increases
Speed increases, wavelength decreases
What is the wavelength of FM radio waves at a frequency of 88 megahertz, given that the speed of radio waves is 3.0 x 10^8 meters/second?
3.0 m
3.4 m
6.0 m
6.8 m
Which type of electromagnetic wave has the shortest wavelength?
Infrared
Microwave
Radio wave
Ultraviolet
Which of the following statements is correct regarding longitudinal waves?
Which of the following is correct regarding longitudinal waves?
It is a wave where the particles of the medium oscillate in the same direction as the wave travels.
It is a wave that travels along the length of the medium.
It is a wave that does not require a medium to travel.
It is a wave where the particles of the medium can oscillate in multiple directions.
Which of the following factors can change the speed of sound in air?
Decrease frequency
Increase wavelength
Increase amplitude
Decrease temperature
Which property of sound waves is related to the occurrence of beats?
Reflection
Refraction
Diffraction
Interference
Which of the following statements is incorrect?
Bats use sound waves in the infrasonic range to navigate and catch prey.
Dogs can hear sounds that have frequencies in the ultrasonic range.
Sounds with frequencies in the infrasonic range have lower frequencies than those humans can hear.
Ultrasonic sound waves can be used to clean medical instruments.
The sonar device on fishing boats receives reflected signals.
What is the depth of the sea if the sonar on a fishing boat receives a signal reflected from the seabed after sending a signal for 0.4 seconds, and the speed of sound in water is 1,500 meters per second?
150 meters
300 meters
600 meters
900 meters
Which of the following waves has the shortest wavelength?
Radio waves
Infrared waves
Microwaves
Visible light waves
In an experiment to observe the effects of obstacles when waves pass through, which property of waves is being studied?
Refraction
Diffraction
Reflection
Interference
If a wave is created on a string that is tightly stretched at both ends, and it has a certain frequency and wavelength, what happens if the frequency is doubled?
The wavelength is halved
The wavelength remains the same
The amplitude increases
The wave speed increases
What happens to the wavelength on a string when the frequency is doubled?
The wavelength on the string is halved because the wave travels in the same medium.
The wavelength on the string is doubled because both quantities vary together.
The wavelength on the string remains the same because the wave is generated in the same medium.
The wavelength on the string remains the same, but the wave speed doubles according to the equation v = fl.
What effect does the material used in the walls of a cinema have on sound?
Refraction
Reflection
Resonance
Doppler Effect
Which of the following statements about electromagnetic waves is incorrect?
All types of electromagnetic waves travel at the same speed in a vacuum.
Some types of electromagnetic waves require a medium to travel.
When electromagnetic waves travel in a changing medium, their speed changes.
Electromagnetic waves consist of both electric and magnetic fields.
Natural phenomena in
What phenomenon in nature does not affect the propagation of radio waves?
Changing the size of sunspots
Aurora Borealis and Aurora Australis
Rising water and falling water
Day and night
If gamma rays enter an area with a magnetic field that is perpendicular to the direction of the gamma rays' movement, what will be the path of the gamma rays?
Bend to the side
Move in a circular path
Continue in the same direction
Reverse back
Longitudinal waves and transverse waves are defined based on which main factor?
Direction of wave movement
Direction of particle oscillation in the medium
Type of source
Wavelength
A ball falls into the water and bounces up and down several times, creating surface waves that spread out in a circular shape. After 10 seconds, the water waves spread out to a maximum radius of approximately 20 meters. What is the distance between wave crests?
What is the frequency at which the ball bounces?
0.5 Hz
1.0 Hz
2.0 Hz
4.0 Hz
What property helps reduce sound in a room with a ceiling made of paper and carpeted floor?
Reflection of sound
Refraction of sound
Interference of sound
Diffraction of sound
Which factor affects the speed of sound in air?
Frequency
Temperature
Loudness
Sound intensity
Why are electromagnetic waves classified as transverse waves?
Because the magnetic field is perpendicular to the electric field
Because the magnetic and electric fields are opposite to the direction of wave propagation
Because the magnetic and electric fields are in the same direction
Why is electricity considered a transverse wave?
Because the magnetic field is perpendicular to the electric field.
Because the magnetic field and electric field are opposite to the direction of wave propagation.
Because the magnetic field and electric field are perpendicular to the direction of wave propagation.
Because the magnetic field and electric field are in the same direction as the direction of wave propagation.
If an AM radio station broadcasts at a frequency of 800 kHz, which statement is correct?
The speech is amplified and transmitted with a signal frequency of 800 kHz periodically.
The speech is mixed with a carrier wave at a frequency of 800 kHz.
The speech is mixed with a carrier wave at a non-constant frequency but results in a constant frequency of 800 kHz.
The carrier wave frequency of 800 kHz is adjusted down to no more than 20 kHz for human hearing.
In which direction does the refraction of sound waves from hot air to cold air occur the most?
(a)
What is the direction of sound wave refraction from hot air to cold air?
A
B
C
D
E
Mr. A and Mr. B hear sound from the same source. Mr. A is twice as far from the source as Mr. B. Which conclusion is correct?
Mr. A hears a higher frequency than Mr. B.
Mr. B hears a higher frequency than Mr. A.
Mr. A hears a higher intensity than Mr. B.
Mr. B hears a higher intensity than Mr. A.
Mr. A and Mr. B hear the same intensity.
When mixing audio signals with AM radio waves, if a carrier wave frequency of 350 kHz and an audio signal frequency of 2 kHz are used, what will be the output frequency from the transmitter?
2
175
350
700
1,400
How to make a simple telephone using two paper cups with holes and a string tied in a knot?
If one person speaks, the other will hear the sound transmitted through the string. If the string is pulled tight, how will the sound be perceived by the other child?
The same
Higher pitch
Lower pitch
Intermittent sound
Unintelligible sound
Which of the following is related to the refraction of waves?
Bats can fly around obstacles in the dark
Not hearing thunder but seeing lightning
Soundproofing a conference room
Detecting aircraft with radar
Hearing music even when the speaker is turned away
Source A and B produce a sound mix with a beat frequency of 3 Hertz. As the frequency of source B is gradually increased, the beat frequency decreases. Which conclusion is correct?
A has a higher frequency than B
A has a higher speed of sound than B
A has a longer wavelength than B
A has a lower frequency than B
As the frequency of source B increases slowly, the beats frequency decreases. Which conclusion is correct?
A has a higher frequency than B
A has a higher speed of sound than B
A has a longer wavelength than B
A has better sound quality than B
A has a higher sound intensity than B
Calculate the wavelength of a radio wave with a frequency of 100 MHz.
0.33 meters
3.00 meters
300 meters
3 kilometers
30 kilometers
Which spectrum of electromagnetic waves can human senses directly detect?
Infrared
Ultraviolet
X-rays
Radio waves
Microwaves
Which properties cause waves to differ from massive objects? (2 answers)
Diffraction
Interference
Refraction
Speed
Reflection
Which waveband is used for satellite communication?
VHF
UHF
Microwaves
Infrared
Ultraviolet
The wavefront of a straight line in a moving water tray collides with the edge of the tray.
Which wave band is used for satellite communication?
VHF
UHF
Microwave
Infrared
Ultraviolet
In the diagram, which angles are called the angle of incidence and the angle of reflection according to the law of reflection?
α
α
β
π
π
What condition does not cause constructive interference when wave A and wave B combine at a point?
Crest of wave A meets crest of wave B with equal amplitudes.
Crest of wave A meets trough of wave B with equal amplitudes.
Trough of wave A meets trough of wave B with equal amplitudes.
Crest of wave A meets crest of wave B with different amplitudes.
Trough of wave A meets trough of wave B with different amplitudes.
The cone of a megaphone made of paper...
What principle of sound waves is utilized by a paper cone that allows us to transmit sound further?
Reflection
Refraction
Interference
Diffraction
Beats
What property of electronic circuits allows a keyboard to imitate the sound of other musical instruments?
Frequency
Sound Quality
Frequency and Loudness
Frequency and Intensity
Frequency and Volume
What property of mechanical waves differs from that of electromagnetic waves?
Reflection
Refraction
Interference
Diffraction
Medium Dependency
When a coffee straw is immersed in a glass of water, what phenomenon is observed?
When a coffee straw is immersed in a glass of water, the part of the straw that is underwater does not appear to be in line with the part that is above the water. This phenomenon occurs due to which property?
Reflection
Refraction
Interference
Diffraction
Medium dependence
What describes the characteristics of electromagnetic waves incorrectly?
They are transverse waves.
They consist of electric and magnetic fields oscillating perpendicular to each other.
In a vacuum, they travel at a speed of 3×10^8 meters per second.
The electric field oscillates perpendicular to the ground and the magnetic field oscillates parallel to the ground.
The magnetic field induces an electric field and the electric field induces a magnetic field.
What is the phenomenon that occurs when two sound waves with slightly different properties mix together?
Wave speed
Amplitude
Loudness
Frequency
Sound intensity level
Which type of electromagnetic wave has the highest penetrating ability?
AM radio waves
Gamma rays
Microwaves
Infrared
Ultraviolet
If two identical notes are played together for 10 seconds and due to the imperfection of the instrument, beats are heard 20 times, what is the possible frequency of the other note?
351 Hz
348 Hz
349 Hz
352 Hz
346 Hz
What frequency in kilohertz must a bat use to avoid colliding with a wire that has a diameter of 3 millimeters?
120
100
50
40
30
The tuning fork A is made by itself in the
How many millimeters is the diameter of the wire?
120
100
50
40
30
What is the frequency of tuning fork A when compared to the standard tuning fork of 440 Hz?
438.4
439.2
441.0
443.2
444.0
In a factory with a noise level of 90 dB, how much should the earplugs reduce the noise level to allow workers to hear at 70 dB?
20
70
80
100
160
What type of wave has a frequency of 1.5 x 10^15 Hz?
Gamma rays
FM radio waves
Infrared radiation
Microwaves
Ultraviolet radiation
Consider the movement of water waves and the wavefronts shown in the image. Which image correctly shows the wavefronts? (O-Net 61)
Image 1 only
Images 1 and 2
Images 1 and 3
Images 2 and 3
Images 1, 2, and 3
A wave has a frequency of 10 Hertz and the distance between the crest of wave 1 to crest of wave 6 is 5.0 meters. How long will it take for the wave to travel a distance of 100.0 meters? (O-Net 61)
0.3 seconds
2.0 seconds
10.0 seconds
12.0 seconds
20.0 seconds
A person with hearing impairment can hear sounds when the sound intensity is not less than 1 x 10^-8 watts per square meter. If he wants to hear a sound from a point source with a power of 10^-4 watts, what is the sound intensity?
How far can this person be from the sound source and still hear the sound?
1.5 meters
50 meters
meters
meters
meters
What is the frequency of the radio wave sent from radio tower A to radio tower B?
310^7 Hertz
310^8 meters per second
meters
meters
meters
What is the wavelength of the radio wave traveling from radio tower A to radio tower B, and what is the direction of the electric field?
Wavelength 10 meters and direction up-down
Wavelength 10 meters and direction left-right
Wavelength 10 meters and direction perpendicular to the paper
Wavelength 90 meters and direction up-down
Wavelength 90 meters and direction perpendicular to the paper
According to the information provided, which statement is correct regarding the electromagnetic wave energy (E) and frequency (f)?
Wave a has the lowest frequency
Wave e has the highest frequency
Wave c has a frequency in between
Wave b has a medium frequency
Wave d has a frequency that is not defined
From the information above, which statement is correct?
Wave a has the lowest frequency
Wave e has the highest frequency
Wave b has more energy than wave d
Microwave with a wavelength of 1 cm is in wave d
If light visible to the eye is in wave c, infrared radiation will be in wave b
If the wave on this string has a wavelength of 2.4 meters, what is the speed of the wave?
0.2 meters per second
0.5 meters per second
0.6 meters per second
1.2 meters per second
4.8 meters per second
The person is sitting by the pool and uses their feet to hit the water surface.
When the wave moves from deep water to shallow water, it is observed that the wavelength decreases. Is this thought correct because the frequency increases?
Correct, because when the speed is constant, if the wavelength decreases, the frequency will increase.
Correct, because in that distance, the shallow water has more waves, so the frequency increases.
Incorrect, because the distance between adjacent wave crests indicates the frequency, so the frequency decreases.
Incorrect, because when the wave travels from deep water to shallow water, the frequency does not change.
Cannot conclude yet because the change in wave speed between the two areas is unknown.
When will the officer start to hear any sound that has a frequency of 100 Hz, and based on the suspects' sound information, which suspect's sound might the officer not hear?
When the sound intensity level is -5 dB
When the sound intensity level is 0 dB
When the sound intensity level is 5 dB
When the sound intensity level is 10 dB
เสียงที่ได้ยินทั้งสองครั้งแตกต่างกันหรือไม่อย่างไร?
What is the principle of sound according to the answer of Mind?
When close to the sound source, the frequency must decrease, and this sound creates a beat.
When close to the sound source, the frequency remains the same, but the loudness increases, and this sound does not create a beat.
When close to the sound source, the frequency remains the same, but the sound intensity decreases, and this sound does not create a beat.
Beats must occur from sounds with slightly different loudness, but this sound has slightly different frequency, so it does not create a beat.
Beats must occur from sounds with slightly different intensity, but this sound has slightly different frequency, so it does not create a beat.
From the image, what is the direction of the magnetic field?
Upward
Downward
Left
Right
From the image, what is the direction of the magnetic field? If this device is adjusted to emit electromagnetic waves at a lower frequency, how will the wavelength change?
Up - Down increases
Up - Down decreases
Left - Right decreases
Perpendicular to the plane of the paper increases
Perpendicular to the plane of the paper decreases
The mass transport system in a country faces problems due to heavy interference in the communication signals.
Interference occurs when waves are in the same frequency range.
The transport system uses communication signals with a wavelength of x 10^2 meters.
Other telecommunications systems that may cause interference include mobile phone networks operating at frequency ranges of 2,3.
From the information, which system is most likely to interfere with the mass transit communication signals?
Mobile phone network will decrease
Mobile phone network will increase
Mobile phone network remains the same
Public wireless network remains the same
Public wireless network will increase
If the mass transit system switches to a signal frequency of 900 MHz, will the wavelength change?
