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question_answer1)
The walls of the halls built for music concerts should [NCERT 1979]
A)
Amplify sound done
clear
B)
Transmit sound done
clear
C)
Reflect sound done
clear
D)
Absorb sound done
clear
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question_answer2)
A spherical source of power 4 W and frequency 800 Hz is emitting sound waves. The intensity of waves at a distance 200 m is [CPMT 1999; JIPMER 2000]
A)
\[8\times {{10}^{-6}}\,W/{{m}^{2}}\] done
clear
B)
\[2\times {{10}^{-4}}\,W/{{m}^{2}}\] done
clear
C)
\[1\times {{10}^{-4}}\,W/{{m}^{2}}\] done
clear
D)
\[4\,W/{{m}^{2}}\] done
clear
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question_answer3)
If the pressure amplitude in a sound wave is tripled, then the intensity of sound is increased by a factor of [CPMT 1992; JIPMER 2000]
A)
9 done
clear
B)
3 done
clear
C)
6 done
clear
D)
\[\sqrt{3}\] done
clear
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question_answer4)
If the amplitude of sound is doubled and the frequency reduced to one-fourth, the intensity of sound at the same point will be [CBSE PMT 1992]
A)
Increased by a factor of 2 done
clear
B)
Decreased by a factor of 2 done
clear
C)
Decreased by a factor of 4 done
clear
D)
Unchanged done
clear
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question_answer5)
Intensity level of a sound of intensity I is 30 dB. The ratio \[\frac{I}{{{I}_{0}}}\] is (Where \[{{I}_{0}}\] is the threshold of hearing) [KCET 1999; J & K CET 2005]
A)
3000 done
clear
B)
1000 done
clear
C)
300 done
clear
D)
30 done
clear
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question_answer6)
Decibel is unit of [RPMT 2000]
A)
Intensity of light done
clear
B)
X-rays radiation capacity done
clear
C)
Sound loudness done
clear
D)
Energy of radiation done
clear
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question_answer7)
Quality of a musical note depends on [MP PMT 1998; KCET 1999; RPET 2000]
A)
Harmonics present done
clear
B)
Amplitude of the wave done
clear
C)
Fundamental frequency done
clear
D)
Velocity of sound in the medium done
clear
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question_answer8)
When we hear a sound, we can identify its source from [KCET (Med.) 2001]
A)
Amplitude of sound done
clear
B)
Intensity of sound done
clear
C)
Wavelength of sound done
clear
D)
Overtones present in the sound done
clear
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question_answer9)
A man \[x\] can hear only upto 10 kHz and another man \[y\] upto 20 kHz. A note of frequency 500 Hz is produced before them from a stretched string. Then [KCET 2002]
A)
Both will hear sounds of same pitch but different quality done
clear
B)
Both will hear sounds of different pitch but same quality done
clear
C)
Both will hear sounds of different pitch and different quality done
clear
D)
Both will hear sounds of same pitch and same quality done
clear
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question_answer10)
The amplitude of two waves are in ratio 5 : 2. If all other conditions for the two waves are same, then what is the ratio of their energy densities [MH CET 2004]
A)
5 : 2 done
clear
B)
10: 4 done
clear
C)
2.5 : 1 done
clear
D)
25 : 4 done
clear
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question_answer11)
A is singing a note and at the same time B is singing a note with exactly one-eighth the frequency of the note of A. The energies of two sounds are equal, the amplitude of the note of B is [NCERT 1981; AIIMS 2001]
A)
Same that of A done
clear
B)
Twice as that of A done
clear
C)
Four times as that of A done
clear
D)
Eight times as that of A done
clear
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question_answer12)
The loudness and pitch of a sound depends on [KCET 2004; Pb. PET 2003]
A)
Intensity and velocity done
clear
B)
Frequency and velocity done
clear
C)
Intensity and frequency done
clear
D)
Frequency and number of harmonics done
clear
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question_answer13)
If T is the reverberation time of an auditorium of volume V then [KCET 2003]
A)
\[T\propto \frac{1}{V}\] done
clear
B)
\[T\propto \frac{1}{{{V}^{2}}}\] done
clear
C)
\[T\propto {{V}^{2}}\] done
clear
D)
\[T\propto V\] done
clear
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question_answer14)
The intensity of sound from a radio at a distance of 2 metres from its speaker is \[1\times {{0}^{-2}}\mu \ W/{{m}^{2}}.\] The intensity at a distance of 10 meters would be [CPMT 2005]
A)
\[0.2\times {{10}^{-2}}\mu \ W/{{m}^{2}}\] done
clear
B)
\[1\times {{10}^{-2}}\mu \ W/{{m}^{2}}\] done
clear
C)
\[4\times {{10}^{-4}}\mu \ W/{{m}^{2}}\] done
clear
D)
\[5\times {{10}^{-2}}\mu \ W/{{m}^{2}}\] done
clear
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question_answer15)
The intensity of sound wave while passing through an elastic medium falls down by 10% as it covers one metre distance through the medium. If the initial intensity of the sound wave was 100 decibels, its value after it has passed through 3 metre thickness of the medium will be [CPMT 1988]
A)
70 decibel done
clear
B)
72.9 decibel done
clear
C)
81 decibel done
clear
D)
60 decibel done
clear
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question_answer16)
A musical scale is constructed by providing intermediate frequencies between a note and its octave which [CPMT 1972; NCERT 1980]
A)
Form an arithmetic progression done
clear
B)
Form a geometric progression done
clear
C)
Bear a simple ratio with their neighbours done
clear
D)
Form a harmonic progression done
clear
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question_answer17)
In a harmonium the intermediate notes between a note and its octave form [CPMT 1973]
A)
An arithmetic progression done
clear
B)
A geometric progression done
clear
C)
A harmonic progression done
clear
D)
An exponential progression done
clear
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question_answer18)
The power of a sound from the speaker of a radio is 20 mW. By turning the knob of the volume control, the power of the sound is increased to 400 mW. The power increase in decibels as compared to the original power is
A)
13 dB done
clear
B)
10 dB done
clear
C)
20 dB done
clear
D)
800 dB done
clear
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question_answer19)
If separation between screen and source is increased by 2% what would be the effect on the intensity [CPMT 2003]
A)
Increases by 4% done
clear
B)
Increases by 2% done
clear
C)
Decreases by 2% done
clear
D)
Decreases by 4% done
clear
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question_answer20)
The musical interval between two tones of frequencies 320 Hz and 240 Hz is [MP PMT 1992; AFMC 1992]
A)
80 done
clear
B)
\[\left( \frac{4}{3} \right)\] done
clear
C)
560 done
clear
D)
320 × 240 done
clear
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question_answer21)
In an orchestra, the musical sounds of different instruments are distinguished from one another by which of the following characteristics [CBSE PMT 1993]
A)
Pitch done
clear
B)
Loudness done
clear
C)
Quality done
clear
D)
Overtones done
clear
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question_answer22)
The intensity level due to two waves of the same frequency in a given medium are 1 bel and 5 bel. Then the ratio of amplitudes is
A)
1 : 4 done
clear
B)
1 : 2 done
clear
C)
1 : 104 done
clear
D)
1 : 102 done
clear
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question_answer23)
It is possible to recognise a person by hearing his voice even if he is hidden behind a wall. This is due to the fact that his voice [CPMT 1972]
A)
Has a definite pitch done
clear
B)
Has a definite quality done
clear
C)
Has a definite loudness done
clear
D)
Can penetrate the wall done
clear
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question_answer24)
Of the following the one which emits sound of higher pitch is
A)
Mosquito done
clear
B)
Lion done
clear
C)
Man done
clear
D)
Woman done
clear
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question_answer25)
In the musical octave ?Sa?, ?Re?, ?Ga?
A)
The frequency of the note ?Sa? is greater than that of ?Re?, ?Ga? done
clear
B)
The frequency of the note ?Sa? is smaller than that of ?Re?, ?Ga? done
clear
C)
The frequency of all the notes ?Sa?, ?Re?, ?Ga? is the same done
clear
D)
The frequency decreases in the sequence ?Sa?, ?Re?, ?Ga? done
clear
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question_answer26)
Tone A has frequency of 240 Hz. Of the following tones, the one which will sound least harmonious with A is
A)
240 done
clear
B)
480 done
clear
C)
360 done
clear
D)
450 done
clear
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question_answer27)
Learned Indian classical vocalists do not like the accompaniment of a harmonium because [MP PMT 1992]
A)
Intensity of the notes of the harmonium is too large done
clear
B)
Notes of the harmonium are too shrill done
clear
C)
Diatonic scale is used in the harmonium done
clear
D)
Tempered scale is used in the harmonium done
clear
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question_answer28)
Each of the properties of sound listed in column A primarily depends on one of the quantities in column B. Choose the matching pairs from two columns Column A Column B Pitch Waveform Quality Frequency Loudness Intensity [IIT 1980]
A)
Pitch-waveform, Quality-frequency; Loudness-intensity done
clear
B)
Pitch-frequency, Quality-waveform; Loudness-intensity done
clear
C)
Pitch-intensity, Quality-waveform; Loudness- frequency done
clear
D)
Pitch-waveform, Quality- intensity; Loudness-frequency done
clear
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question_answer29)
Intensity level 200 cm from a source of sound is 80 dB. If there is no loss of acoustic power in air and intensity of threshold hearing is \[{{10}^{-12}}W{{m}^{-2}}\] then, what is the intensity level at a distance of 400 cm from source
A)
Zero done
clear
B)
54 dB done
clear
C)
64 dB done
clear
D)
44 dB done
clear
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question_answer30)
A point source emits sound equally in all directions in a non-absorbing medium. Two points \[P\]and \[Q\]are at distances of \[2m\]and \[3m\] respectively from the source. The ratio of the intensities of the waves at \[P\]and \[Q\] is [CBSE PMT 2005]
A)
9 : 4 done
clear
B)
2 : 3 done
clear
C)
3 : 2 done
clear
D)
4 : 9 done
clear
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question_answer31)
Quality depends on [AFMC 2003]
A)
Intensity done
clear
B)
Loudness done
clear
C)
Timbre done
clear
D)
Frequency done
clear
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question_answer32)
Two waves having sinusoidal waveforms have different wavelengths and different amplitude. They will be having [BHU 2005]
A)
Same pitch and different intensity done
clear
B)
Same quality and different intensity done
clear
C)
Different quality and different intensity done
clear
D)
Same quality and different pitch done
clear
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