1 |
In a convex mirror the size of the image: |
Is smaller than the size of the object
Is greater than the size of the object
Depends upon the position of the object
Is equal to the size of the object
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2 |
The speed of sound in the air at one atmospheric pressure at room temperature is: |
343 ms-1
346 ms-1
349 ms-1
339 ms-1
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3 |
To hear echo, the distance between the observer and the obstacle is 17m then how much distance will the sound travel? |
60m
54m
17m
34m
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4 |
After how much time the echo must be heard? |
0.1 s
0.10 s
0.20 s
0.50 s
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5 |
Mathematical formula of sound level (in bel) is: |
S.L = 10 log I/Io (bel)
S.L = K log I/Io (bel)
S.L = Log I/Io (bel)
S.L = 10 log Io/I (bel)
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6 |
If the intensity of faintest audible sound is Io and of another sound is I then sound level will be: |
K log Io/I
Log Io/I 2K
K log Io/I2
K log I/Io
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7 |
The difference between the loudness of faintest audible sound and loudness of another sound is called: |
Pitch of sound
Quality of sound
Sound level
Intensity of sound
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8 |
The S.I unit of intensity of sound is: |
Wm
Wm2
Wm-2
Wm-1
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9 |
High pitch means: |
High wavelength
High frequency
High time period
High energy
|
10 |
Pitch of sound depends upon: |
Frequency
Amplitude
Intensity
Time period
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11 |
The character by which lound and faint sound can be distinguished is called: |
Pitch
Quality
Loudness
Intensity
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12 |
The distance between two consecutive compressions or rarefactions in longitudinal waves is called: |
Amplitude
Wavelength
Half wavelength
1/4 wavelength
|