Sound Test

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Sound Test - 1

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SHARING IS CARING

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following will remain unchanged when a sound wave travels in air or in water?

A
Amplitude

B
Speed

C
Frequency

D
Wavelength

Solution

Wavelength will remain unchanged when a sound wave travels in air or in water.
Question 2
1 / -0

The sound intensity level of an ordinary conversation at 50 cm is nearly:

A
1 db

B
10 db

C
20 db

D
65 db

Solution

The sound intensity level for ordinary conversation at 50 cm is nearly 65 db.
Question 3
1 / -0

The sound carried by air from a sitar to a listener is a wave of following type

A
longitudinal stationary

B
transverse progressive

C
transverse stationary

D
longitudinal progressive

Solution

The sound carried by air from a sitar to a listener is a wave of longitudinal progressive wave, as the listener receives sound waves (music) which are longitudinal progressive waves.
Question 4
1 / -0

If the intensity of sound is doubled, the sound level will increase nearly by

A
a factor of 2

B
2 db

C
3 db

D
4 db

Solution

10 log₁₀(2) = 3 db
Question 5
1 / -0

Intensity or loudness depends upon which of the following factors?

A
Amplitude of the vibrating body

B
Distance of the vibrating body

C
Area of the vibrating body & density of medium

D
All factors mentioned above
Question 6
1 / -0

The S.I unit of intensity of sound wave is

A
decibel

B
J m ^{- 2}

C
W m ^{- 2}

D
none of these
Question 7
1 / -0

When a wave is refracted,

A
its path must change

B
its amplitude should change

C
its velocity must change

D
its frequency must change
Question 8
1 / -0

Two sound waves having two sinusoidal waveforms, but different wavelength and amplitude, are said to have

A
the same pitch but different quality

B
the same pitch but different intensity

C
the same quality but different intensity

D
none of these

Solution

Since the two waves have different amplitudes, therefore, they will have different intensities as the pitch depends upon the frequency of the source, while quality depends on the number of harmonics and their relative intensity.
Question 9
1 / -0

At STP the velocity of sound is minimum in

A
helium

B
oxygen

C
hydrogen

D
ozone
Question 10
1 / -0

For 1⁰ F rise in temp, the velocity of sound in air increases nearly by

A
0.61m /s

B
0.34 m / s

C
2 m /s

D
6 m / s

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Re-Attempt Weekly Quiz Competition

Sound Test - 1

Result

Sound Test - 1

Score

-

Rank

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SHARING IS CARING

Question 1

Amplitude

Speed

Frequency

Wavelength

Solution

Question 2

1 db

10 db

20 db

65 db

Solution

Question 3

longitudinal stationary

transverse progressive

transverse stationary

longitudinal progressive

Solution

Question 4

a factor of 2

2 db

3 db

4 db

Solution

Question 5

Amplitude of the vibrating body

Distance of the vibrating body

Area of the vibrating body & density of medium

All factors mentioned above

Question 6

decibel

J m - 2

W m - 2

none of these

Question 7

its path must change

its amplitude should change

its velocity must change

its frequency must change

Question 8

the same pitch but different quality

the same pitch but different intensity

the same quality but different intensity

none of these

Solution

Question 9

helium

oxygen

hydrogen

ozone

Question 10

0.61m /s

0.34 m / s

2 m /s

6 m / s

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J m ^{- 2}

W m ^{- 2}