# Physiccs: sound Online Test

In the musical octave ‘Sa’, ‘Re’, ‘Ga’ ____.
the frequency of the note ‘sa’ is greater than that of ‘re’, ‘ga’
the frequency of the note ‘sa’ is smaller than that of ‘re’, ‘ga’
the frequency of all the notes ‘sa’, ‘re’, ‘ga’ is the same
the frequency decreases in the sequence ‘sa’, ‘re’, ‘ga’
Tone A has frequency of 240 Hz. Of the following tones, the one which will sound least harmonious with A is ____.
240
480
360
450
Learned Indian classical vocalists do not like the accompaniment of a harmonium because ____.
intensity of the notes of the harmonium is too large
notes of the harmonium are too shrill
diatonic scale is used in the harmonium
tempered scale is used in the harmonium
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
pitch-waveform, quality-frequency; loudness-intensity
pitch-frequency, quality-waveform; loudness-intensity
pitch-intensity, quality-waveform; loudness- frequency
pitch-waveform, quality- intensity; loudness-frequency
/
Zero
54 dB
64 dB
44 dB
A point source emits sound equally in all directions in a non-absorbing medium. Two points and are at distances of and  respectively from the source. The ratio of the intensities of the waves at and  is ____.
9 : 4
2 : 3
3 : 2
4 : 9
Quality depends on ____.
intensity
loudness
timbre
frequency
The intensity of sound wave while passing through elastic medium falls down by 10 % as it covers one meter distance through the medium. If the initial intensity of the sound wave was 100 decibels, its value after it has passed through 3 meter thickness of the medium is ____.
70 decibel
72.9 decibel
81 decibel
60 decibel
A musical scale is constructed by providing intermediate frequencies between a note and its octave which ____.
form an arithmetic progression
form a geometric progression
bear a simple ratio with their neighbors
form a harmonic progression
In an orchestra, the musical sounds of different instruments are distinguished from one another by which of the following characteristics?
Pitch
Loudness
Quality
Overtones
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Interesting questions like why a musician does not like harmonium to accompany their recital are asked in this test

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Kajal Sengupta
Physics 9th to 12 th grade,CIE, Edexcel, AP, IB , CBSE, ICSE
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