8th Grade > Physics
SOUND MCQs
Total Questions : 55
| Page 6 of 6 pages
Answer: Option B. ->
Solids
:
B
Sound wave travels the fastest in solids and the slowest in gases. Sound waves requires a medium for its propagation. Therefore, it cannot travel through vacuum.
:
B
Sound wave travels the fastest in solids and the slowest in gases. Sound waves requires a medium for its propagation. Therefore, it cannot travel through vacuum.
Answer: Option A. ->
True
:
A
:
A
Vibrations are responsible for the production of sounds. In a flute, air column vibrates to produce sound.
Answer: Option A. ->
True
:
A
:
A
In air, the speed of light is about 3×108 ms−1, while the speed of sound is about 343 ms−1. Thus, the given statement is true.
Answer: Option B. ->
False
:
B
:
B
Sound waves travel as longitudinal waves in liquids and gases. However, in solids, they can propagate as both longitudinal and transverse waves.
Answer: Option B. ->
5 Hz
:
B
The audible range for humans is 20 Hz to 20 kHz. From the above, 5 Hz is not audible to humans. Sounds with frequencies below 20 Hz are called infrasonic sounds and above 20 kHz are called ultrasonic sounds.
:
B
The audible range for humans is 20 Hz to 20 kHz. From the above, 5 Hz is not audible to humans. Sounds with frequencies below 20 Hz are called infrasonic sounds and above 20 kHz are called ultrasonic sounds.
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