Sound is a type of:
a) Electromagnetic wave
b) Transverse wave
c) Longitudinal wave
d) Static wave
The speed of sound is fastest in:
a) Air
b) Water
c) Vacuum
d) Steel
Which unit is used to measure the loudness of sound?
a) Hertz
b) Newton
c) Decibel
d) Joule
The frequency of sound is measured in:
a) Decibel
b) Hertz
c) Joule
d) Meter
Which property of sound determines its pitch?
a) Amplitude
b) Frequency
c) Wavelength
d) Velocity
The phenomenon of sound bouncing back from a surface is called:
a) Diffraction
b) Refraction
c) Reflection
d) Absorption
Sound cannot travel through:
a) Water
b) Air
c) Vacuum
d) Metal
Which factor affects the speed of sound in air?
a) Temperature
b) Humidity
c) Pressure
d) Both a and b
Which type of sound wave has a frequency higher than human hearing?
a) Infrasonic
b) Audible
c) Ultrasonic
d) Supersonic
Which instrument is used to measure the intensity of sound?
a) Barometer
b) Oscilloscope
c) Sound level meter
d) Thermometer
What is the typical range of human hearing?
a) 10 Hz – 50 kHz
b) 20 Hz – 20 kHz
c) 50 Hz – 100 kHz
d) 100 Hz – 10 kHz
The amplitude of a sound wave is related to its:
a) Loudness
b) Frequency
c) Speed
d) Wavelength
Which phenomenon explains the change in frequency of a sound when the source is moving?
a) Refraction
b) Diffraction
c) Doppler Effect
d) Resonance
Which medium allows sound to travel the fastest?
a) Water
b) Air
c) Steel
d) Oil
The distance between two successive compressions in a sound wave is called:
a) Frequency
b) Amplitude
c) Wavelength
d) Velocity
Which of the following uses ultrasonic waves?
a) X-rays
b) Sonar
c) Microwaves
d) Infrared rays
Which term describes the repeated reflection of sound?
a) Echo
b) Reverberation
c) Diffraction
d) Resonance
Which part of the human ear detects sound vibrations?
a) Cochlea
b) Eardrum
c) Pinna
d) Auditory nerve
The speed of sound in air at room temperature is approximately:
a) 330 m/s
b) 500 m/s
c) 250 m/s
d) 1000 m/s
What happens to the pitch of a sound as its frequency increases?
a) It gets lower
b) It gets higher
c) It remains the same
d) It becomes inaudible
Which term describes sound waves vibrating at the natural frequency of an object?
a) Diffraction
b) Resonance
c) Reflection
d) Refraction
Which of the following is an example of a low-frequency sound?
a) Whistle
b) Thunder
c) Alarm
d) Bell
Which property of sound is affected when a person speaks louder?
a) Amplitude
b) Frequency
c) Wavelength
d) Pitch
Which term refers to sound waves spreading around obstacles?
a) Diffraction
b) Refraction
c) Absorption
d) Transmission
Which of the following is an application of ultrasonic waves?
a) MRI scans
b) Ultrasound imaging
c) Infrared sensors
d) X-ray machines
What is the main factor that affects the speed of sound in a solid?
a) Density
b) Elasticity
c) Temperature
d) Humidity
Which part of the sound wave determines the energy carried by it?
a) Wavelength
b) Frequency
c) Amplitude
d) Speed
What happens when sound travels from air to water?
a) Speed decreases
b) Speed increases
c) Frequency changes
d) Wavelength decreases
Which sound property is responsible for musical notes sounding different?
a) Loudness
b) Pitch
c) Timbre
d) Amplitude
Which of the following can be used to break the sound barrier?
a) Helicopter
b) Supersonic jet
c) Car
d) Train
