10th Class Physics MCQS
To hear echoes, the minimum distance of the obstacle from source of sound should be:
20 m
17 m
15 m
10 m
Which form of energy is sound?
Thermal
Electrical
Mechanical
Chemical
the distance between two consecutive trough or crest is called:
amplitude
time period
frequency
wavelength
The intensity of lawn mover is:
10 1 wm 2
10 3wm 2
10-2wm-2
10 1wm 3
Time period is reciprocal of:
Amplitude
Frequency
Wave length
Cycle
Pitch of sound depends upon:
Time period
Amplitude
Intensity
Frequency
The difference between the loudness of faintest audible sound and loudness of another sound is called:
Quality of sound
Pitch of sound
Sound level
Intensity of sound
The water waves obey the laws of:
All of these
Refraction
Diffraction
Reflection
After how much time the echo must be heard?
0.1 s
0.10 s
0.20 s
0.50 s
the number of waves passing through a point in one second is called
time period
cycle
frequency
amplitude
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