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SOUND & SOUND WAVES PROPERTIES IN PHYSICS SOLVED MCQs

Sound Solved MCQs

1.   

      What is a wave?

a.      A particle in motion

b.     A disturbance that travels through a medium

c.      A stationary object

d.     A type of electromagnetic radiation

 

2.     Which of the following waves requires a medium to travel through?

a.      Radio waves

b.     Light waves

c.      Sound waves

d.     X-rays

 

3.     What is the amplitude of a wave?

a.      The distance between two consecutive troughs

b.     The distance between two consecutive crests

c.      The maximum displacement of particles from their equilibrium position

d.     The speed of the wave

 

4.     The distance between two consecutive crests of a wave is called:

a.     Wavelength

b.     Frequency

c.      Amplitude

d.     Period

 

5.     Which of the following properties of a wave determines its pitch in the case of sound waves?

a.      Amplitude

b.     Frequency

c.      Wavelength

d.     Speed

 

6.     The time it takes for one complete wavelength to pass a point is called:

a.      Frequency

b.     Wavelength

c.      Period

d.     Amplitude

 

7.     In which direction do transverse waves vibrate?

a.      Parallel to the direction of wave propagation

b.     Perpendicular to the direction of wave propagation

c.      At an angle of 45 degrees to the direction of wave propagation

d.     In a circular motion

 

8.     Which type of wave can propagate in a vacuum?

a.      Sound waves

b.     Transverse waves

c.      Longitudinal waves

d.     Electromagnetic waves

 

9.     When a wave undergoes reflection, what property remains unchanged?

a.      Wavelength

b.     Amplitude

c.      Frequency

d.     Speed

 

10.  Diffraction refers to the wave property of:

a.      Changing direction when passing through a boundary between two media

b.     Bouncing off a surface at the same angle it arrives

c.      Spreading out when passing through a narrow opening or around an obstacle

d.     Constructive and destructive interference

 

11.  The number of complete oscillations or cycles of a wave that occur in one second is called:

a.      Amplitude

b.     Wavelength

c.      Frequency

d.     Velocity

 

12.  The phenomenon of the bending of waves around obstacles or edges is called:

a.      Reflection

b.     Diffraction

c.      Refraction

d.     Interference

 

13.  The interference pattern observed when two identical waves overlap in phase is called:

a.      Destructive interference

b.     Constructive interference

c.      Refraction

d.     Diffraction

 

14.  Which type of wave requires a medium (substance) to travel through?

a.      Transverse wave

b.     Longitudinal wave

c.      Electromagnetic wave

d.     Standing wave

 

15.  The speed of a wave is determined by its:

a.      Amplitude

b.     Wavelength

c.      Frequency

d.     Energy

 

16.  In a transverse wave, the particles of the medium move:

a.      In the direction of the wave

b.     Opposite to the direction of the wave

c.      In random directions

d.     In a circular motion

 

17.  The maximum displacement of a particle from its equilibrium position in a wave is known as:

a.      Frequency

b.     Wavelength

c.      Amplitude

d.     Velocity

 

18.  The speed of a wave is given by:

a.     Speed = Frequency × Wavelength

b.     Speed = Amplitude × Wavelength

c.      Speed = Frequency ÷ Wavelength

d.     Speed = Amplitude ÷ Frequency

 

19.  Which of the following statements about longitudinal waves is true?

a.      The particles oscillate perpendicular to the direction of wave propagation.

b.     Longitudinal waves cannot travel through fluids.

c.      Sound waves are an example of longitudinal waves.

d.     Longitudinal waves require a vacuum for propagation.

 

20.  When two waves meet and their amplitudes add together, the resulting phenomenon is called:

a.      Diffraction

b.     Interference

c.      Refraction

d.     Dispersion

 

21.  The change in the apparent frequency of a wave due to the relative motion between the source and the observer is known as:

a.      Reflection

b.     Diffraction

c.      Doppler effect

d.     Refraction

 

22.  Which type of wave is characterized by the particles of the medium moving perpendicular to the direction of wave propagation?

a.     Transverse wave

b.     Longitudinal wave

c.      Standing wave

d.     Surface wave

 

23.  When a wave travels from one medium to another and its speed changes, what phenomenon occurs?

a.      Reflection

b.     Diffraction

c.      Interference

d.     Refraction

 

24.  What is the relationship between the frequency (f) and the period (T) of a wave?

a.      f = T

b.     f = 1/T

c.      f = 2T

d.     f = T2

 

25.  If the frequency of a wave doubles while its wavelength remains constant, what happens to its speed?

a.      It doubles

b.     It halves

c.      It remains the same

d.     It quadruples

 

26.  A wave has a frequency of 200 Hz and a wavelength of 2 meters. What is the wave's speed?

a.      100 m/s

b.     200 m/s

c.      400 m/s

d.     800 m/s

 

27.  A guitar string has a fundamental frequency of 440 Hz. If the speed of the wave on the string is 220 m/s, what is the wavelength of the fundamental mode?

a.     0.5 m

b.     1 m

c.      2 m

d.     4 m

 

28.  What is sound?

a.      A form of light

b.     A type of energy

c.      A type of heat

d.     A mechanical wave

 

29.  What is the speed of sound in air at room temperature (approximately 20°C)?

a.     343 meters per second

b.     300,000,000 meters per second

c.      1500 meters per second

d.     30 meters per second

 

30.  Which of the following mediums would sound travel the fastest through?

a.      Water

b.     Steel

c.      Air

d.     Vacuum

 

31.  The frequency of a sound wave determines its:

a.      Loudness

b.     Amplitude

c.      Pitch

d.     Speed

32.  What is the unit of measurement for amplitude?

a.      Hertz

b.     Decibel

c.      Meter

d.     Watt

 

33.  In which state of matter does sound travel the fastest?

a.     Solid

b.     Liquid

c.      Gas

d.     Sound travels at the same speed in all states of matter

 

34.  What is an echo?

a.      A type of interference pattern

b.     A rarefaction of sound waves

c.      A reflection of sound waves

d.     A type of diffraction

 

35.  What is the range of human hearing in terms of frequency?

a.      0.1 Hz to 100 Hz

b.     20 Hz to 20,000 Hz

c.      1 kHz to 1 MHz

d.     10 Hz to 100,000 Hz

 

36.  What is the primary mode of energy transfer in sound propagation?

a.      Conduction

b.     Convection

c.      Radiation

d.     Diffraction

 

37.  The speed of sound in a medium is most closely related to:

a.      Density of the medium

b.     Temperature of the medium

c.      Pressure of the medium

d.     Viscosity of the medium         

 

38.  When sound waves travel from air to water, what happens to their speed?

a.      It decreases

b.     It increases

c.      It remains the same

d.     It depends on the frequency

 

39.  The lowest frequency of vibration of a stringed instrument is known as its:

a.      Overtone

b.     Harmonic

c.      Fundamental frequency

d.     Resonant frequency

 

40.  The quality of sound that distinguishes two sounds of the same pitch and loudness is called:

a.      Frequency

b.     Amplitude

c.      Timbre

d.     Wavelength

 

41.  When a sound wave reflects from a surface, the angle of incidence is equal to the angle of:

a.      Absorption

b.     Diffraction

c.      Reflection

d.     Refraction

 

42.  Which part of the human ear amplifies sound vibrations and transmits them to the inner ear?

a.      Eardrum

b.     Cochlea

c.      Auditory nerve

d.     Ossicles

 

43.  The unit of measurement for sound intensity is the:

a.     Decibel (dB)

b.     Hertz (Hz)

c.      Watt (W)

d.     Joule (J)

 

44.  Which part of the ear is responsible for transmitting sound vibrations to the inner ear?

a.     Eardrum (tympanic membrane)

b.     Cochlea

c.      Auditory nerve

d.     Pinna

 

45.  Infrasound refers to sound waves with frequencies:

a.      Above the audible range

b.     Below the audible range

c.      In the ultrasonic range

d.     Exactly at the audible range

 

46.  Which material would be the best absorber of sound waves?

a.      Smooth, hard surface

b.     Rough, soft surface

c.      Transparent surface

d.     Reflective surface

 

47.  A tuning fork vibrates with a frequency of 256 Hz. If the speed of sound is 340 m/s, what is the wavelength of the sound wave produced by the tuning fork?

a.      0.85 m

b.     1.33 m

c.      0.66 m

d.     0.42 m

 

48.  Two sound waves of frequencies 300 Hz and 500 Hz respectively, have the same wavelength. If the speed of sound is 340 m/s, what is the wavelength?

a.      0.68 m

b.     0.34 m

c.      1.13 m

d.     0.905 m

 

49.  A sound wave travels in air with a frequency of 500 Hz. What is the wavelength of this sound wave in air? (Speed of sound in air is approximately 343 m/s.)

a.     0.686 m

b.     0.686 cm

c.      0.343 m

d.     1.5 m

 

50.  A tuning fork produces a sound wave with a frequency of 440 Hz. What is the wavelength of the sound wave in air if the speed of sound is 340 m/s?

a.     0.77 m

b.     0.15 m

c.      0.23 m

d.     1.54 m

 

51.  A sound wave has a wavelength of 0.2 m and a frequency of 800 Hz. What is the speed of the wave?

a.      400 m/s

b.     160 m/s

c.      1600 m/s

d.     0.25 m/s

 

52.  Two sound waves have frequencies of 300 Hz and 450 Hz. What is the beat frequency?

a.     150 Hz

b.     750 Hz

c.      1500 Hz

d.     900 Hz

 

53.  A sound wave travels from air into water. If the frequency of the wave remains constant, what will change?

a.     The speed of the wave

b.     The amplitude of the wave

c.      The wavelength of the wave

d.     The energy of the wave

 

54.  The superposition of two or more waves can result in a new wave with:

a.      Lower frequency

b.     Higher amplitude

c.      Smaller wavelength

d.     All of the above

 

55.  Two sound waves, A and B, have the same frequency but different amplitudes. The wave with the higher amplitude will have:

a.      Higher pitch

b.     Lower pitch

c.      Louder volume

d.     Softer volume

 

56.  The fundamental frequency of a closed pipe that is 50 cm long is:

a.      85.7 Hz

b.     171.4 Hz

c.      342.8 Hz

d.     428.5 Hz

 

57.  If the amplitude of a sound wave is doubled, the intensity of the sound will:

a.      Double

b.     Quadruple

c.      Halve

d.     Remain unchanged

 

58.  Two sound waves, one with a frequency of 300 Hz and another with a frequency of 500 Hz, interfere with each other. What is the beat frequency?

a.     100 Hz

b.     200 Hz

c.      300 Hz

d.     500 Hz

 

59.  The intensity of a sound wave is inversely proportional to the square of the distance from the source. If the intensity is measured as 40 W/m² at a distance of 5 meters, what will be the intensity at a distance of 10 meters from the source?

a.      10 W/m²

b.     20 W/m²

c.      40 W/m²

d.     80 W/m²

 

60. The Doppler effect is applicable to which type of waves?

a) Only sound waves in air.

b) Only light waves in vacuum.

c) Both sound and light waves.

d) Only electromagnetic waves.

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Location: Larkana, Sindh, Pakistan

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