Physics
Grade-8
Easy
Question
If the amplitude of a sound increases, then it is said to be ______ .
- Reverberated
- Amplified
- Echo
- Mute
Hint:
Amplified
The correct answer is: Amplified
- Loudness of a sound depends on its amplitude.
- On increasing the amplitude of a sound its loudness increases.
- Amplified sound is any sound that is made louder.
- So, the correct option is b.
- An echo is a reflection of sound that arrives to the listener with a delay after the original sound.
- Reverberated sound is when you hear the same sound continuing to echo.
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Sound cannot travel in space because sound cannot travel through _______.
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154Hz sound frequency comes under ________ .
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Which of the following parts of the ear transmits the electrical signals to the brain for interpretation?
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Increase in wavelength ___________ frequency.
- Wave speed= frequency × wavelength.
- Frequency = wave speed/wavelength.
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- Wave speed= frequency × wavelength.
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The frequency of vibration of an object is 25000 Hz. A person ____ hear it.
Frequency above 20KHz is called ultrasound.
The frequency of vibration of an object is 25000 Hz. A person ____ hear it.
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Frequency above 20KHz is called ultrasound.
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Which of the following is not a part of the middle ear?
Which of the following is not a part of the middle ear?
PhysicsGrade-8
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The frequency of vibration of an object is 150 Hz. A person ____ hear it.
The frequency of vibration of an object is 150 Hz. A person ____ hear it.
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The frequency of the sound can be modified to change the infrasound to _____.
The frequency of the sound can be modified to change the infrasound to _____.
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When an ear drum encounters a rarefaction, it ____.
Compression or high pressure push the eardrum inwards.
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Compression or high pressure push the eardrum inwards.
