NCERT Class 9 Science Sound Questions

Read and download NCERT Class 9 Science Sound Questions in NCERT book for Class 9 Science. You can download latest NCERT eBooks chapter wise in PDF format free from Studiestoday.com. This Science textbook for Class 9 is designed by NCERT and is very useful for students. Please also refer to the NCERT solutions for Class 9 Science to understand the answers of the exercise questions given at the end of this chapter

NCERT Book for Class 9 Science Chapter 12 Sound

Class 9 Science students should refer to the following NCERT Book Chapter 12 Sound in Class 9. This NCERT Book for Class 9 Science will be very useful for exams and help you to score good marks

Chapter 12 Sound NCERT Book Class 9

SOUND

1. Note is a sound

(a) of mixture of several frequencies

(b) of mixture of two frequencies only

(c) of a single frequency

(d) always unpleasant to listen

2. A key of a mechanical piano struck gently and then struck again but much harder this time. In the second case

(a) sound will be louder but pitch will not be different

(b) sound will be louder and pitch will also be higher

(c) sound will be louder but pitch will be lower

(d) both loudness and pitch will remain unaffected

3. In SONAR, we use

(a) ultrasonic waves

(b) infrasonic waves

(c) radio waves

(d) audible sound waves

4. Sound travels in air if

(a) particles of medium travel from one place to another

(b) there is no moisture in the atmosphere

(c) disturbance moves

(d) both particles as well as disturbance travel from one place to another.

5. When we change feeble sound to loud sound we increase its

(a) frequency

(b) amplitude

(c) velocity

(d) wavelength

6. A girl is sitting in the middle of a park of dimension 12 m × 12 m. On the left side of it there is a building adjoining the park and on right side of the park, there is a road adjoining the park. A sound is produced on the road by a cracker. Is it possible for the girl to hear the echo of this sound? Explain your answer.

7. Why do we hear the sound produced by the humming bees while the sound of vibrations of pendulum is not heard?

8. If any explosion takes place at the bottom of a lake, what type of shock waves in water will take place?

9. Sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given speed of sound = 340 m s–1.)

10. Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved?

11. Represent graphically by two separate diagrams in each case

(i) Two sound waves having the same amplitude but different frequencies?

(ii) Two sound waves having the same frequency but different amplitudes.

(iii) Two sound waves having different amplitudes and also different wavelengths.

11. Establish the relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 m s–1, calculate

(i) wavelength when frequency is 256 Hz.

(ii) frequency when wavelength is 0.85 m.

12. Draw a curve showing density or pressure variations with respect to distance for a disturbance produced by sound. Mark the position of compression and rarefaction on this curve. Also define wavelengths and time period using this curve.


Please refer to attached file for NCERT Class 9 Science Sound Questions

NCERT Book Class 9 Science Chapter 12 Sound

The above NCERT Books for Class 9 Science Chapter 12 Sound have been published by NCERT for latest academic session. The textbook by NCERT for Chapter 12 Sound Science Class 9 is being used by various schools and almost all education boards in India. Teachers have always recommended students to refer to Chapter 12 Sound NCERT etextbooks as the exams for Class 9 Science are always asked as per the syllabus defined in these ebooks. These Class 9 Chapter 12 Sound book for Science also includes collection of question. Along with Science Class 9 NCERT Book in Pdf for Chapter 12 Sound we have provided all NCERT Books in English Medium for Class 9 which will be really helpful for students who have opted for english language as a medium. Class 9 students will need their books in English so we have provided them here for all subjects in Class 9.

Where can I download latest NCERT Book for Class 9 Science Chapter 12 Sound

You can download the NCERT Book for Class 9 Science Chapter 12 Sound for latest session from StudiesToday.com

Can I download the NCERT Books of Class 9 Science Chapter 12 Sound in Pdf

Yes, you can click on the link above and download chapter wise NCERT Books in PDFs for Class 9 for Science Chapter 12 Sound

Are the Class 9 Science Chapter 12 Sound NCERT Book available for the latest session

Yes, the NCERT Book issued for Class 9 Science Chapter 12 Sound have been made available here for latest academic session

How can I download the Class 9 Science Chapter 12 Sound NCERT Book

You can easily access the link above and download the Class 9 NCERT Books Science Chapter 12 Sound for each chapter