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.
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Sound, Science, Class 9 - Test - Question 1

### 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

### Loud sound can travel a larger distance, due to

Sound, Science, Class 9 - Test - Question 3

### Which characteristic is this? We can distinguish between sound having the same pitch and loudness.

Sound, Science, Class 9 - Test - Question 4

Speed of sound depends upon

Sound, Science, Class 9 - Test - Question 5

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

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

Reverberation of sound is used in

Sound, Science, Class 9 - Test - Question 8

Children under the age of 5 can hear upto

Sound, Science, Class 9 - Test - Question 9

Dolphins, bats and porpoise use

Sound, Science, Class 9 - Test - Question 10

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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