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Class 9 Exam  >  Class 9 Tests  >  Sound, Science, Class 9 - Test - Class 9 MCQ

Sound, Science, Class 9 - Test - Class 9 MCQ


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10 Questions MCQ Test - Sound, Science, Class 9 - Test

Sound, Science, Class 9 - Test for Class 9 2024 is part of Class 9 preparation. The Sound, Science, Class 9 - Test questions and answers have been prepared according to the Class 9 exam syllabus.The Sound, Science, Class 9 - Test MCQs are made for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Sound, Science, Class 9 - Test below.
Solutions of Sound, Science, Class 9 - Test questions in English are available as part of our course for Class 9 & Sound, Science, Class 9 - Test solutions in Hindi for Class 9 course. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free. Attempt Sound, Science, Class 9 - Test | 10 questions in 20 minutes | Mock test for Class 9 preparation | Free important questions MCQ to study for Class 9 Exam | Download free PDF with solutions
Sound, Science, Class 9 - Test - Question 1
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A wave in slinky travelled to and fro in 5 sec the length of the slinky is 5 m. The velocity of wave is

Detailed Solution for Sound, Science, Class 9 - Test - Question 1
As the wave moves to and fro so the total distance will be d=2x5=10 m

we have
time (t) = 5 s

hence velocity will be =2 m/s
Sound, Science, Class 9 - Test - Question 2
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Loud sound can travel a larger distance, due to

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Sound, Science, Class 9 - Test - Question 3
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Which characteristic is this? We can distinguish between sound having the same pitch and loudness.

Sound, Science, Class 9 - Test - Question 4
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Speed of sound depends upon
Sound, Science, Class 9 - Test - Question 5
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 Speed (v), wavelength (λ) and frequency (ν) of sound are related as
Detailed Solution for Sound, Science, Class 9 - Test - Question 5

The time taken by the wave for one complete oscillation of the density or pressure of the medium is called the time period, T. The speed v, frequency ν, and wavelength λ, of sound are related by the equation, v = λν.

Sound, Science, Class 9 - Test - Question 6
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To hear a distinct echo the time interval between the original sound and the reflected sound must be
Sound, Science, Class 9 - Test - Question 7
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Reverberation of sound is used in
Sound, Science, Class 9 - Test - Question 8
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Children under the age of 5 can hear upto
Sound, Science, Class 9 - Test - Question 9
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Dolphins, bats and porpoise use
Sound, Science, Class 9 - Test - Question 10
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The part of human ear that converts sound vibrations into electrical signals are
Detailed Solution for Sound, Science, Class 9 - Test - Question 10
The eardrum converts sound into vibration and cochlea receive the vibrationnow the cochlea has to send the message to the brains. since brain can'tunderstand vibration cochlea converts soundvibration to the electrical signal which makes the brain easy to read.
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