Sound & Acoustics MCQs with Answers

In an organ pipe, if a person blows air faster, what change will occur in the sound waves?

• A.Frequency increases and wavelength decreases
• B.Frequency decreases and wavelength increases
• C.Amplitude increases and frequency remains same
• D.Both frequency and wavelength increase

Three musical notes with frequencies 300 Hz, 400 Hz, and 500 Hz are sounded simultaneously. After what time interval will the combined sound frequencies be heard simultaneously again?

• A.0.01 second
• B.0.1 second
• C.1 second
• D.None of these

When sound waves enter a different medium, the quantity that remains unchanged is ?

• A.Amplitude
• B.Wavelength
• C.Speed
• D.Frequency

The velocity of a wave is equal to ?

• A.Wavelength × Frequency
• B.Wavelength / Frequency
• C.Frequency / Wavelength
• D.Wavelength + Frequency

Physical property which is most responsible for resonance is _?

• A.Frequency
• B.Amplitude
• C.Wavelength
• D.Velocity

At resonance, which of the following is maximum?

• A.Amplitude
• B.Frequency
• C.Wavelength
• D.Velocity

Past Paper MCQ

What physical quantity is measured in decibels?

• A.Frequency of sound
• B.Intensity of sound
• C.Speed of sound
• D.Wavelength of sound

A wave in which the particles of the medium vibrate back and forth in the same direction, parallel to the motion of the wave, is called _?

• A.Transverse Wave
• B.Longitudinal Wave
• C.Electromagnetic Wave
• D.Stationary Wave

Echoes are produced due to _?

• A.Refraction of sound
• B.Absorption of sound
• C.Diffraction of sound
• D.Reflection of sound

Which of the following is longitudinal waves?

• A.Light waves
• B.Sound waves
• C.Radio waves
• D.X-rays