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Question-1
The distinct reflected sound from any rigid surface is called:
(A)
Reverberation
(B)
Echo
(C)
Radar
(D)
Ultrasonic sound
Question-2
The audible frequency of human ear is:
(A)
From 20 Hz to 20000 Hz
(B)
Below 20 Hz
(C)
Above 20,000 Hz
(D)
All the above
Question-3
In human beings, the sound is produced by the:
(A)
Ear drum
(B)
Ear tube
(C)
Voice box
(D)
Outer ear
Question-4
Speed of sound in air is:
(A)
100 m/s
(B)
330 km/s
(C)
330 m/s
(D)
343 m/s
Question-5
The number of oscillations per second is called:
(A)
Time period
(B)
Frequency
(C)
Amplitude
(D)
Vibration
Question-6
Sound is produced due to:
(A)
Stretching
(B)
Vibration
(C)
Reflection
(D)
Expansion
Question-7
The maximum displacement of a vibrating body from its mean position is called:
(A)
Time period
(B)
Frequency
(C)
Amplitude
(D)
Displacement
Question-8
Sounds of frequency less than 20 Hz are called:
(A)
Infrasonic sound
(B)
Ultrasonic sound
(C)
Audible sound
(D)
Echo
Question-9
Amplitude and wavelength are the characteristics of:
(A)
Sound
(B)
Light
(C)
Wave
(D)
Force
Question-10
A snake detects vibration in the ground with its:
(A)
Ear
(B)
Skin
(C)
Tail
(D)
Lower jaw bone
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Cambridge Secondary Grade 8
IGCSE
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