Compression and Rarefaction

Q.

Choose the Most appropriate answer.
In a tube when a sound wave is created, compression and rarefaction pulses are produced. The rarefaction pulse has pressure.

1. 0

2. Minimum

3. Negative

4. Minimum but greater than 0

Q. Consider the following statements about sound passing through a gas
$\left(A\right)$ The pressure of the gas at a point oscillates with time
$\left(B\right)$ The position of a small layer of gas oscillates with time

1. $\left(B\right)$ is correct but $\left(A\right)$ is wrong
2. Both $\left(A\right)$ and $\left(B\right)$ are wrong
3. $\left(A\right)$ is correct but $\left(B\right)$ is wrong
4. Both $\left(A\right)$ and $\left(B\right)$ are correct

Q. Phase difference between a particle at a compression and a particle at successive rarefaction is

1. $\frac{\pi }{2}$
2. $\frac{\pi }{3}$
3. $\pi$
4. $\frac{\pi }{4}$

Q. Sound waves in air are always longitudinal because

1. Air have no rigidity
2. Air can be compressed or rarefied
3. Air is a mixture of several gases
4. Air exerts pressure

Q. The thermodynamic process involved in the propagation of sound wave in gaseous medium is

1. Adiabatic
2. Isothermal
3. Isobaric
4. Isochoric

Q. A sound wave has a wavelength $\lambda$. The distance between the first compression and the fourth rarefaction is

1. $2.5\lambda$
2. $\lambda$
3. $5\lambda$
4. $3.5\lambda$

Q. What are the low pressure regions which are created when sound travels through a medium known as?

1. Compression
2. Rarefaction
3. Trough
4. Crest

Q.

Compression and rarefaction is related to which of these waves?

1. Longitudinal wave

2. Transverse wave

3. Radio waves

4. Light waves

Q.

In a sound wave, compression is the region of the low pressure.

1. True

2. False

Q. With respect to the image given below of a sound wave propagating through air, identify the regions which correspond to rarefaction.

1. A
2. B
3. C
4. D