Representation of Sound Waves

Q.

Differentiate between Loudness and pitch.

Q.

Pitch of sound is determined by its

1. frequency

2. amplitude

3. speed

4. loudness

Q.

The displacement-distance graph for a particle in a wave is shown below. Then the value of 'R' is ___ , if,

$(2\lambda +Ris3timestheamplitudeofthewave)$

Q.

What affects natural frequency

Q. Is sound wave travelling through air longitudinal or transverse in nature?

Q.

Propagation of disturbance due to vibratory motion of particle of the medium is called ______________

Q.

Which of the following is not a part of sound wave?

1. Timbre

2. Colour

3. Loudness

4. Pitch

Q. The characteristic of sound that helps to differentiate between sounds of same frequency and amplitude is:

1. Pitch
2. Loudness
3. Intensity
4. Timbre

Q.

An automatic focus camera is able to focus on objects by use of an ultrasonic sound wave. The camera sends out sound waves which reflect of distant objects and return to the camera. A sensor detects the time it takes for the waves to return and then determines the distance an object is from the camera. The camera lens then focuses at the distance. If a sound wave$(speed=340m{s}^{-1})$ returns to the camera$0.150s$ after leaving the camera, then how far away is the object ?

Q. How does the wave pattern of a loud note differ from a soft note ? Draw a diagram.

Q.

Explain the nature of Light and Sound waves.

Q.

The displacement-time graph for a particle in a wave is shown below. Then the time period of the wave is ___ seconds.

Q.

State two differences between light waves and sound waves.

Q.

For higher pitch of the sound wave frequency has to be ______.

1. Zero

2. half of the wavelength

3. High

4. Low

Q. From the given displacement – distance graph of a sound wave, find the value of $\text{AC – BC + CE - EF}$.​

1. $5.75\text{cm}$
2. $5.5\text{cm}$
3. $4.25\text{cm}$
4. $4.5\text{cm}$

Q. Wave in which particles oscillate along the direction of wave propagation is known as ___.

1. transverse wave
2. longitudinal wave
3. mechanical wave
4. non-mechanical wave

Q. In a longitudinal wave, a compression is a region of ____________.

1. low density
2. high density
3. no pressure
4. low pressure

Q. (a) Draw a diagram to represent a sound wave.
(b) How does sound produced by a source reach our ears?

Q.

Sound waves always behave as a longitudinal waves.

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

Q.

Answer the following :
A. What is the reason for the heat being produced when we rub our hands?
B. Where will it require more effort to drag a box - on marble or on concrete road? Why? [5 MARKS]

Q. A body vibrating with a higher frequency will
(a) have a lower pitch
(b) have a higher pitch
(c) be louder
(d) be softer

Q. Statement 1: In longitudinal waves, the particles of the medium vibrate perpendicular to the direction of propagation of the wave.
Statement 2: Sound travels in air if both particles and the disturbance travel from one place to another.
Pick the correct option.

1. Statement-I is correct, but statement-II is incorrect.
2. Statement-I is incorrect, but statement-II is correct.
3. Both statements are correct.
4. Both statements are incorrect.

Q. Label the parts of the transverse wave given below.

1. Trough
2. Crest
3. Amplitude

Q. During wave propagation, low and high pressure regions are represented by and respectively on a graph.

1. trough
2. crest
3. up-arrow
4. down-arrow