Sound

A man claps his hands near a mountain and hears the echo in 6 sec. If the distance of the mountain in 990 m. What is the speed of the sound?
1. 330 m/s
2. 340 m/s
3. 325 m/s
4. 350 m/s
Sound can not travel through?
1. Steel
2. Water
3. Air
4. Vaccum
Which of these is true?
1. Sound waves are longitudinal
2. Sound travel faster in steel than air
3. A sound wave consists of places of higher pressure called compression and place of lower pressure called rarefaction
4. All of these
Which of these has the highest velocity?
1. Sound velocity in dry air at $0 ° C$
2. Sound velocity in dry air at $10 ° C$
3. Sound velocity in dry air at $20 ° C$
4. None of these
What is the name of short duration wave?
1. Wavelength
2. Time period
3. Frequency
4. Pulse
Which of these are not true?
1. The inner ear consists of a cochlea, the semicircular canals, and the auditory nerve
2. The middle ear is an air-filled cavity that consists of an eardrum and three tiny, interconnected bones - the hammer, anvil, and stirrup
3. The Human Ear consists of three basic parts - the outer ear, the middle ear, and the inner ear
4. None of these
Pitch of high frequency sound is?
1. Low
2. High
3. Zero
4. Infinite
Why cant we hear the scream of the bat?
1. Because it scream consist of ultrasonic sound
2. Because it scream consist of infrasonic sound
3. Because they don't emit sound
4. None of these
The ceilings of concert halls and conference halls made curved why?
1. This way sound waves reaches all the part after reflection from the curved surface
2. This way sound does not become distorted and confusing
3. This way reverberation is avoided
4. All of these
Two statement are made
Statement A: Loudness of sound depends on amplitude
Statement B: Quality of the sound depends on waveform
Which of the below option is correct?
1. Only A is correct
2. Only B is correct
3. Both A and B are correct
4. Both A and B are incorrect
What is the frequency of a sound wave whose time period is 0.05 s?
1. None of these
2. 40 Hetrz
3. 20 Hertz
4. 10 Hertz
The wavelength of sound emitted by a source is $1.7 \times 10^{- 2} m$ . Calculate the frequency of the sound, if its velocity is 343.4 m/s:
1. $2.02 \times 10^{2} H z$
2. $1 \times 10^{4} H z$
3. $2.02 \times 10^{3} H z$
4. $2.02 \times 10^{4} H z$
Sound waves travel with a speed of about 330 m/s. What is the wavelength of sound whose frequency is 550 hertz?
1. 0.6 metre
2. 1.6 metre
3. 1 metre
4. 1.67 metre
A source is producing 1500 sound waves in 3 seconds. If the distance covered by a compression and an adjacent rarefaction be 68 cm, the velocity of the sound wave is:
1. 340 km/h
2. 340 m/h
3. 340 m/s
4. 340 km/s
If a thunder is heard by a man 4 seconds after the lightning is seen, how far is the lightning from the man? (Speed of sound in air = 330 m/s)
1. 82.5 metres
2. 1320 metres
3. 132 metres
4. 1200 metres
A sonar device attached to a ship sends ultrasonic waves in the sea. These waves are reflected from the bottom of the sea. If the ultrasonic waves take 4 seconds to travel from the ship to the bottom of the sea and back to the ship, what is the depth of the sea? (Speed of sound in water = 1500 m/s)
1. 6000 m
2. 1500 m
3. 3000 m
4. 2000 m
Which of the following statement best describes frequency?
1. The maximum disturbance caused by a wave
2. The number of complete vibrations per second
3. The distance between one crest of a wave and the next one
4. The distance travelled by a wave per second
Which of the following vibrates when a musical note is produced by the cymbals in an orchestra?
1. Stretched strings
2. Stretched membranes
3. Metal plates
4. Air columns
In the sound wave produced by a vibrating tuning fork, half the wavelength is represented by:
1. AB
2. BD
3. DE
4. AE
The maximum speed of vibrations which produce audible sound will be in:
1. Dry air
2. Sea water
3. Ground glass
4. Human blood
Which of the following can produce longitudinal waves as well as transverse waves under different conditions?
1. Water
2. TV transmitter
3. Slinky
4. Tuning fork
In SONAR we use:
1. Ultrasonic waves
2. Infrasonic waves
3. Radio waves
4. Audible sound waves
When we change a febble sound to a loud sound, we increase its:
1. Frequency
2. Amplitude
3. Velocity
4. Wavelength
Which kind of sound is produced in an earthquake before the main shock wave begins?
1. Ultrasound
2. Infrasound
3. Audible sound
4. None of these
"Note" is a sound:
1. Of a mixture of several frequencies
2. Of mixture of only two frequencies
3. Of a single frequency
4. Always unpleasant to listen to
One of the following can hear infrasound.
1. Dog
2. Bat
3. Rhinoceros
4. Humans
An echo-sounder in a fishing boat receives an echo from a shoal of fish 0.4 s after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal?
1. 150 m
2. 300 m
3. 600 m
4. 7500 m
The ultrasound waves can penetrate into matter to a large extent because they have:
1. Very high speed
2. Very high frequency
3. Very high wavelength
4. Very high amplitude
The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea by the echo method?
1. 15,000 Hz
2. 10 kHz
3. 50 kHz
4. 10,000 Hz
Which of the following device does not work on the multiple reflections of sound waves?
1. Stethoscope
2. Hydrophone
3. Soundboard
4. Megaphone

Sound

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