List of top Physics Questions on sound

A point source is placed at origin. Its intensity at distance of 2 cm from source is I then intensity at distance 4 cm from the source shall be.

Which of the following is a transducer ?
(A) Loudspeaker
(B) Amplifier
(C) Rectifier
(D) Microphone
Choose the correct answer from the options given below :

An organ pipe 40cm long is open at both ends. The speed of sound in air is 360ms^-1 . The frequency of the second harmonic is ____Hz.

The velocity of sound in a gas, in which two wavelengths, 4.08 m and 4.16 m produce 40 beats in 12 s, will be:

In an experiment to determine the velocity of sound in air at room temperature using a resonance tube, the first resonance is observed when the air column has a length of 20.0 cm for a tuning fork of frequency 400 Hz is used. The velocity of the sound at room temperature is 336 ms^–1. The third resonance is observed when the air column has a length of ______ cm.

An observer moves towards a stationary source of sound with a velocity equal to one-fifth of the velocity of sound. The percentage change in the frequency will be:

The first overtone frequency of an open organ pipe is equal to the fundamental frequency of a closed organ pipe. If the length of the closed organ pipe is 20 cm. The length of the open organ pipe is ______ cm.

The length of a second's pendulum at the surface of earth is 1 m. The length of second's pendulum at the surface of moon where g is \(\frac{1}{6}^{th}\) that at earth's surface is

A man is watching two trains, one leaving and the other coming in with equal speeds of 4m/sec. If they sound their whistles, each of frequency 240 Hz, the number of beats heard by the man (velocity of sound in air = 320 m/sec) will be equal to

A band playing music at frequency f is moving towards a wall at a speed \(v_b\). A motorist is following the band with a speed \(v_m\). If v is the speed of sound, the expression for the beat frequency heard by the motorist is

Which of the following principles is being used in Sonar Technology ?

Two tuning forks with natural frequencies $340\,Hz$ each move relative to a stationary observer. One fork moves away from the observer, while the other moves towards the observer at the same speed. The observer hears beats of frequency $3\, Hz$. Find the speed of the tuning forks.

The speed of sound through oxygen gas at $T \, K$ is $v \,m \,s^{-1}$. If the temperature becomes $2T$ and oxygen gas dissociated into atomic oxygen, the speed of sound

Velocity of sound waves in air is $330 \,m/s$. For a particular sound in air, a path difference of $40 \,cm$ is equivalent to phase difference of $1.6\pi$ The frequency of the wave is

The distance between the two successive nodes is

The ratio of speed of sound in Hydrogen to that in Oxygen at the same temperature is

The fundamental frequency of an open organ pipe increases as the temperature is increased. As the temperature increases, the velocity of sound increases more rapidly than length of the pipe.

Which phenomenon is common in both light and sound waves ?

Each of the properties if sound in List-I primarily depends on one of the quantities in List-II. Select the correct answer (matching List-I with List-II) as per code given below the lists:

The intensity of sound increases at night due to

Reverberation time does not depend upon

There are $26$ tuning forks arranged in the decreasing order of their frequencies. Each tuning fork gives $3$ beats with the next. The first one is octave of the last. What is the frequency of 18th tuning fork?

The equation of a simple harmonic wave is given by $y = 5= \,\sin \frac {\pi} {2} (100 \,t-x)$ where $x$ and $y$ are in metre and time is in second. The period of the wave in second will be

A point source emits sound equally in all directions in a non-absorbing medium. Two point P and Q are at distances of 2 m and 3 m respectively from the source. The ratio of the intensities of the waves at P and Q is