Physics
Grade-8
Easy
Question
Reverberation occurs only in ________.
- Open surface
- Round surface
- Close surface
- None
Hint:
Closed surface
The correct answer is: Close surface
- Reverberation is the multiple reflection of a sound in a closed surface.
- So, the correct option is c.
Related Questions to study
Physics
The louder unpleasant sound is called as ______.
The louder unpleasant sound is called as ______.
PhysicsGrade-8
Physics
SONAR is used in _______.
- It works on the principle of reflection of ultrasound waves.
SONAR is used in _______.
PhysicsGrade-8
- It works on the principle of reflection of ultrasound waves.
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The sound from the transmitter of the SONAR is reflected by.
The sound from the transmitter of the SONAR is reflected by.
PhysicsGrade-8
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The SONAR can detect the enemy ship using _________.
The SONAR can detect the enemy ship using _________.
PhysicsGrade-8
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Distance can be measured in ___________.
- The SI unit of time is second.
- The SI unit of pressure is pascal.
- The SI unit of force is newton.
Distance can be measured in ___________.
PhysicsGrade-8
- The SI unit of time is second.
- The SI unit of pressure is pascal.
- The SI unit of force is newton.
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The SI unit of velocity is kg/s.
The SI unit of velocity is kg/s.
PhysicsGrade-8
Physics
Guitar can produce __________.
Guitar can produce __________.
PhysicsGrade-8
Physics
If the velocity of sound is 3 m/s and the distance between the object is 3 m, find the time taken to hear an echo?
If the velocity of sound is 3 m/s and the distance between the object is 3 m, find the time taken to hear an echo?
PhysicsGrade-8
Physics
Sounds which are unpleasant to hear are called ________.
- A pleasant sound is called music.
Sounds which are unpleasant to hear are called ________.
PhysicsGrade-8
- A pleasant sound is called music.
Physics
Decreasing amplitude decreases _______.
Decreasing amplitude decreases _______.
PhysicsGrade-8
Physics
Amplitude is denoted by __________.
Amplitude is denoted by __________.
PhysicsGrade-8
Physics
An increase in amplitude makes a sound wave _______.
An increase in amplitude makes a sound wave _______.
PhysicsGrade-8
Physics
Sounds that are pleasant to hear are called ultrasounds.
Ultrasounds are high frequency sounds.
Sounds that are pleasant to hear are called ultrasounds.
PhysicsGrade-8
Ultrasounds are high frequency sounds.
Physics
Communication in the submarines is using infra waves.
Communication in the submarines is using infra waves.
PhysicsGrade-8
Physics
The device that transmits ultrasounds in SONAR is called _______.
- A receiver receives the sound reflected from the depths of the sea and perceives it.
The device that transmits ultrasounds in SONAR is called _______.
PhysicsGrade-8
- A receiver receives the sound reflected from the depths of the sea and perceives it.
