Question Bank: Sound

What is the SI unit of frequency?

a) Hertz
b) Decibel
c) Meter
d) Joule
The speed of sound is fastest in:

a) Air
b) Water
c) Steel
d) Vacuum
The time taken by an object to complete one oscillation is called:

a) Frequency
b) Wavelength
c) Time period
d) Amplitude
Sound cannot travel through:

a) Solids
b) Liquids
c) Gases
d) Vacuum
The pitch of a sound depends on its:

a) Amplitude
b) Frequency
c) Speed
d) Loudness
The loudness of a sound is determined by its:

a) Frequency
b) Speed
c) Amplitude
d) Wavelength
Which of the following is not a characteristic of sound waves?

a) Frequency
b) Wavelength
c) Amplitude
d) Photon
The human ear can generally hear sounds in the frequency range of:

a) 0-20 Hz
b) 20-20,000 Hz
c) 200-200,000 Hz
d) 2,000-20,000 Hz
Sound waves are:

a) Longitudinal waves
b) Transverse waves
c) Electromagnetic waves
d) None of the above
The phenomenon of reflection of sound is known as:

a) Refraction
b) Echo
c) Absorption
d) Diffusion
The frequency of a sound wave is doubled. How will its wavelength change in the same medium?

a) It will double
b) It will halve
c) It will remain the same
d) It will quadruple
Which of the following does not affect the speed of sound in air?

a) Temperature
b) Pressure
c) Humidity
d) Wavelength
In which medium is the speed of sound the slowest?

a) Steel
b) Water
c) Air
d) Vacuum
The unit of loudness of sound is:
a) Hertz
b) Decibel
c) Meter
d) Joule
The phenomenon of multiple reflections of sound in a large hall is called:

a) Echo
b) Reverberation
c) Diffraction
d) Interference
The minimum distance for an echo to be heard distinctly is approximately:

a) 17 meters
b) 34 meters
c) 50 meters
d) 10 meters
Which of the following waves requires a medium for propagation?

a) Sound waves
b) Light waves
c) Radio waves
d) X-rays
The speed of sound in air at 20°C is approximately:

a) 220 m/s
b) 330 m/s
c) 440 m/s
d) 540 m/s
Which of the following is not a longitudinal wave?

a) Sound waves
b) Seismic P-waves
c) Light waves
d) Ultrasound waves
The wave characteristic that determines the pitch of the sound is:

a) Amplitude
b) Frequency
c) Wavelength
d) Speed
In which of the following mediums does sound travel the fastest?

a) Helium
b) Oxygen
c) Water
d) Iron
What happens to the speed of sound as the temperature of the medium increases?

a) It decreases
b) It increases
c) It remains constant
d) It fluctuates
The phenomenon where sound bends around obstacles and spreads out is called:

a) Reflection
b) Refraction
c) Diffraction
d) Interference
The wavelength of a sound wave is 0.5 meters, and its speed is 340 m/s. What is its frequency?

a) 680 Hz
b) 170 Hz
c) 340 Hz
d) 510 Hz
Sound is a form of:

a) Chemical energy
b) Kinetic energy
c) Mechanical energy
d) Thermal energy
Which of the following is used to measure the frequency of sound?

a) Ammeter
b) Voltmeter
c) Oscilloscope
d) Thermometer
Which type of waves are used in ultrasonic imaging?

a) Infrared waves
b) Sound waves
c) X-rays
d) Gamma rays
The part of the ear that vibrates when sound waves enter it is called:

a) Cochlea
b) Eardrum
c) Pinna
d) Auditory nerve
The persistence of sound in a hall due to repeated reflections is known as:

a) Reverberation
b) Echo
c) Refraction
d) Diffraction
The amount of energy in a sound wave is proportional to its:

a) Wavelength
b) Frequency
c) Amplitude
d) Speed