Introduction to Sound Wave

Q.

What are the differences between mechanical and non-mechanical waves?

Q.

A source producing 1500 sound waves in 3s. If the distance covered by a compression and an adjacent rarefaction be 68 cm. find a frequency, wavelength & velocity of sound waves

Ans 500hz, 1.36m and 680m/s

Pls solve fast

Q. In , sound is produced due to vibration of the air column.

1. guitar
2. drum
3. flute

Q.

The SI unit of time period.

Q. helps to distinguish the sound waves having same loudness and same pitch.

1. Frequency
2. Amplitude
3. Quality

Q.

The distance between a compression and the next rarefaction of a longitudinal wave is

1. ^λ /₃

2. ^λ /₄

3. ^y/_λ

4. λ /₂

Q. A bell ringing in water will produce sound waves that are _ in nature.

1. Transverse
2. Diagonal
3. Linear
4. Longitudinal

Q. A rarefaction or depression, is a region of low density of particles in a longitudinal wave.

1. True
2. False

Q. How is sound produced in a flute?

Q.

Is it possible to link within the current page

Q. Question 20
Draw a curve showing density or pressure variations with respect to distance for a disturbance produced by sound. Mark the position of compression and rarefaction on this curve. Also define wavelengths and time period using this curve

Q. Question 14
If any explosion takes place at the bottom of a lake, what type of shock waves in water will take place?

Q.

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

1. True

2. False

Q. Byjus said that sound is a mechanical wave, longitudinal and transverse wave sometimes. But my teacher said that sound is a form of energy. Who is correct?

Q.

What is the period of oscillation?

Q.

The to and fro motion of an object is called________.

Q. Sir, as sound travel in wave tell me more about the vibrations and also it's facts..

Q.

Select The Meaning Of The Given Phrase/Idiom. Look Into:(A) Observe.(B) Evaluate.(C) See Inside. (D) Investigate.

Q. Which of the following instruments produces sounds by the vibrations of the air column in them?

1. Flute
2. Both (B) and (C)
3. Jaltarang
4. Harmonium

Q. If there is an explosion on the moon, a person standing at some distance can hear the sound.

1. Yes
2. No

Q. Choose the correct nature of waves which enables us to see the solar flares but not hear them.

1. Sound: mechanical wave
   Light: non-mechanical wave
2. Sound: non-mechanical wave
   Light: mechanical wave
3. Sound: mechanical wave
   Light: mechanical wave
4. Sound: non-mechanical wave
   Light: non-mechanical wave

Q. In a longitudinal wave, particles do not vibrate at all.

1. True
2. False

Q. Find the frequency of sound wave in air if distance between a compression and adjacent rarefaction is 0.5 mm . Speed of sound wave in air is 330m/s

Q. Submarine uses ............................ for navigation which works on principle of ..........................

1. Radar, Reflection of ultrasonic waves.
2. Sonar, Reflection of ultrasonic waves.
   
3. Radar, Detection of cosmic radio waves.
   
4. Periscope, bending of light.
   

Q. Which among these is transferred when a sound wave is propagating?

1. Energy
2. Matter
3. Both matter and energy
4. Atoms

Q. Compression is the region of in a sound wave.

1. low pressure
2. normal pressure
3. high pressure

Q.

Wavelength of a sound wave is defined as

1. time between occurrence of two peaks/valleys

2. distance between two peaks/valleys.

3. density gap between peaks/valleys.

4. pressure difference between two peaks/valleys.

Q. When we are talking on a mobile phone, there are particles moving from one end to another end.

1. True
2. False

Q. Which of the following is/are properties of a sound wave?

1. It does not requires a medium to propagate.
2. It is a longitudinal wave.
3. It is a mechanical wave.
4. Travels faster than light.

Q.

Sound is produced when a body ______________.