CBSE NCERT Solutions for Class 9 Science Chapter 12

CBSE NCERT Solutions for Class 9 Science Chapter 12 Sound Page 162 or Page 163 or Page 166 or Page 167 or Page 168 or Page 169 or Page 170 or Page 172 and Exercises in English Medium or पेज 182 के उत्तर or पेज 186 के उत्तर or पेज 187 के उत्तर or पेज 188 के उत्तर or पेज 189 के उत्तर or पेज 190 के उत्तर or पेज 191 के उत्तर or पेज 193 के उत्तर and  अभ्यास के प्रश्न उत्तर  in PDF form. Solutions of other subjects are also available free to download.


CBSE NCERT Solutions for Class 9 Science Chapter 12

NCERT Solutions for Class 9 Science Chapter 12

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Page 162 Answers

CBSE NCERT Solutions for Class 9 Science Chapter 12 Sound page 162 is given below. For other questions visit to Page 163 or Page 166 or Page 167 or Page 168 or Page 169 or Page 170 or Page 172 or Exercises or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound page 162

Page 163 Answers





NCERT Solutions for Class 9 Science Chapter 12 Sound page 163 is given below. For other questions visit to Page 162 or Page 166 or Page 167 or Page 168 or Page 169 or Page 170 or Page 172 or Exercises or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound page 163

Page 166 Answers

NCERT Solutions for Class 9 Science Chapter 12 Sound page 166 is given below. For other questions visit to Page 162 or Page 163 or Page 167 or Page 168 or Page 169 or Page 170 or Page 172 or Exercises or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound page 166



NCERT Solutions for Class 9 Science Chapter 12 Sound page 166 in pdf form
NCERT Solutions for Class 9 Science Chapter 12 Sound page 166 all answers

Page 167 Answers




NCERT Solutions for Class 9 Science Chapter 12 Sound page 167 is given below. For other questions visit to Page 162 or Page 163 or Page 166 or Page 168 or Page 169 or Page 170 or Page 172 or Exercises or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound page 167

Page 168 Answers

NCERT Solutions for Class 9 Science Chapter 12 Sound page 168 is given below. For other questions visit to Page 162 or Page 163 or Page 166 or Page 167 or Page 169 or Page 170 or Page 172 or Exercises or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound page 168

Page 169 Answers





NCERT Solutions for Class 9 Science Chapter 12 Sound page 169 is given below. For other questions visit to Page 162 or Page 163 or Page 166 or Page 167 or Page 168 or Page 170 or Page 172 or Exercises or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound page 169

Page 170 Answers

NCERT Solutions for Class 9 Science Chapter 12 Sound page 170 is given below. For other questions visit to Page 162 or Page 163 or Page 166 or Page 167 or Page 168 or Page 169 or Page 172 or Exercises or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound page 170

Page 172 Answers




NCERT Solutions for Class 9 Science Chapter 12 Sound page 172 is given below. For other questions visit to Page 162 or Page 163 or Page 166 or Page 167 or Page 168 or Page 169 or Page 170 or Exercises or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound page 172

Exercises Questions Answers




NCERT Solutions for Class 9 Science Chapter 12 Sound Exercises Question answers are given below. For other questions visit to Page 162 or Page 163 or Page 166 or Page 167 or Page 168 or Page 169 or Page 170 or Page 172 or go for Hindi Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

NCERT Solutions for Class 9 Science Chapter 12 Sound Exercises Question answers
NCERT Solutions for Class 9 Science Chapter 12 Sound Exercises Question answers in pdf form




NCERT Solutions for Class 9 Science Chapter 12 Sound Exercises Question answers in english medium NCERT Solutions for Class 9 Science Chapter 12 Sound Exercises Question answers for up board high school
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NCERT Solutions for Class 9 Science Chapter 12 Sound Exercises Question answers free download
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पेज 182 के उत्तर




NCERT Solutions for Class 9 Science Chapter 12 Sound पेज 182 के उत्तर given below. For other questions visit to पेज 186 or पेज 187 or पेज 188 or पेज 189 or पेज 190 or पेज 191 or पेज 193 or  अभ्यास के प्रश्न उत्तर  or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

9 Science Chapter 12 Sound पेज 182 के उत्तर 9 Science Chapter 12 Sound पेज 182 के उत्तर guide free

पेज 186 के उत्तर




NCERT Solutions for Class 9 Science Chapter 12 Sound पेज 186 के उत्तर given below. For other questions visit to पेज 182 or पेज 187 or पेज 188 or पेज 189 or पेज 190 or पेज 191 or पेज 193 or  अभ्यास के प्रश्न उत्तर  or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

Class 9 Science Chapter 12 Intext Questions page 186
Class 9 Science Chapter 12 Intext Questions page 186 answers in pdf hindi




Class 9 Science Chapter 12 Intext Questions page 186 all solutions

पेज 187 के उत्तर

NCERT Solutions for Class 9 Science Chapter 12 Sound पेज 187 के उत्तर given below. For other questions visit to पेज 182 or पेज 186 or पेज 188 or पेज 189 or पेज 190 or पेज 191 or पेज 193 or  अभ्यास के प्रश्न उत्तर  or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

Class 9 Science Chapter 12 Intext Questions page 187

पेज 188 के उत्तर




NCERT Solutions for Class 9 Science Chapter 12 Sound पेज 188 के उत्तर given below. For other questions visit to पेज 182 or पेज 186 or पेज 187 or पेज 189 or पेज 190 or पेज 191 or पेज 193 or  अभ्यास के प्रश्न उत्तर  or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

Class 9 Science Chapter 12 Intext Questions page 188

पेज 189 के उत्तर




NCERT Solutions for Class 9 Science Chapter 12 Sound पेज 189 के उत्तर given below. For other questions visit to पेज 182 or पेज 186 or पेज 187 or पेज 188 or पेज 190 or पेज 191 or पेज 193 or  अभ्यास के प्रश्न उत्तर  or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

Class 9 Science Chapter 12 Intext Questions page 189

पेज 190 के उत्तर





NCERT Solutions for Class 9 Science Chapter 12 Sound पेज 190 के उत्तर given below. For other questions visit to पेज 182 or पेज 186 or पेज 187 or पेज 188 or पेज 189 or पेज 191 or पेज 193 or  अभ्यास के प्रश्न उत्तर  or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

Class 9 Science Chapter 12 Intext Questions page 190

पेज 191 के उत्तर

NCERT Solutions for Class 9 Science Chapter 12 Sound पेज 191 के उत्तर given below. For other questions visit to पेज 182 or पेज 186 or पेज 187 or पेज 188 or पेज 189 or पेज 190 or पेज 193 or  अभ्यास के प्रश्न उत्तर  or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

Class 9 Science Chapter 12 Intext Questions page 191

पेज 193 के उत्तर




NCERT Solutions for Class 9 Science Chapter 12 Sound पेज 193 के उत्तर given below. For other questions visit to पेज 182 or पेज 186 or पेज 187 or पेज 188 or पेज 189 or पेज 190 or पेज 191 or  अभ्यास के प्रश्न उत्तर  or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

Class 9 Science Chapter 12 Intext Questions page 193

अभ्यास के प्रश्न उत्तर




NCERT Solutions for Class 9 Science Chapter 12 Sound अभ्यास के प्रश्न उत्तर given below. For other questions visit to पेज 182 or पेज 186 or पेज 187 or पेज 188 or पेज 189 or पेज 190 or पेज 191 or पेज 193 or go for English Medium Solutions. Go back to Class 9 Science main page or move to Top of page.

9 Science Chapter 12 Sound अभ्यास के प्रश्न उत्तर
9 Science Chapter 12 Sound Exercises in hindi
9 Science Chapter 12




9 Science Chapter 12 Sound all question answers solved
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Class 9 Science – Physics – Sound

Important questions with answers for practice

Question 1:
Chandigarh radio station broadcast at 1200 kHz. At what metre Chandigarh station would be tuned in your transistor?
Answer 1:
250 m

Question 2:
What is SONAR? How is it used to detect an underwater object and measure its distance?
Answer 2:
It is an acronym which means Sound Navigation And Ranging.
Sonar is a device which measures the distance, direction and speed of objects lying under water ultrasonic waves.
The above method of finding the distance of an object is called echo-ranging as it is based on echo principle. The sonar technique is used to:

  1. To locate the position of other ships or submarines. Ship to ship communication also uses ultrasonic waves. The advantage of using ultrasonic waves is that these waves cannot be heard without the aid of special instruments.
  2. Determine depth of the sea , called echo depth ranging. When used for purpose , it is called fathometer as it directly fathoms the depth of the sea.
  3. Locate underwater hills, valleys, icebergs, submarines and sunken ships.

Question 3:
A bat emits unit ultrasonic sound of frequency 100 kHz in air. If this sound meets a water surface, what is the wavelength of (a) the reflected sound wave (b) the transmitted sound wave. Given speed of sound in air = 340 m/s and in water = 1486 m/s.
Answer 3:
(a)3.4 x 10-³ m (b) 1.486 x 10-²

Question 4:
An engine is approaching a hill at constant speed when it is at a distance of 0.9 km, if blows a whistle, whose echo is heard by the driver after 5 s. if the speed of sound is 340 m/s, calculate the speed of the engine.
Answer 4:
20 m/s

More Questions for Exams

Question 1:
A person standing between two vertical cliffs and 680 m away from the nearest cliff, shouted . he heard the first echo after 4 s and the second echo 3 s later, calculate (a) the speed of sound in air and (b) distance from the two cliffs.
Answer 1:
(a) 340 m/s (b) 1870 m

Question 2:
A hospital uses an ultrasonic scanner to locate tumour in a tissue. What is the wavelength of sound in a tissue in which the speed of sound is 1.7 km/s? The operating frequency of the scanner is 4.2 MHz .
Answer 2:
0.0004 m

Question 3:
A sonar emits pulses on the surface of water which are detected after reflection from its bottom at a depth of 1534 m. if the time interval between the emission and detection of the pulse is 2 s, find the speed of sound in water.
Answer 3:
1531 m/s

Question 4:
Distinguish between music and noise?
Answer 4:
Music:
1. It has a pleasant effect on the ear.
2. It consists of a series of sound impulses which follow one another regularly.
3. The frequency of musical sound is high
4. There are no sudden changes in amplitude (loudness) of the wave constituting a musical sound.
Noise:
1. It has an unpleasant effect on the ear.
2. The sound impulses do not follow one another regularly.
3. The frequency of noise is low.
4. There are usually sudden changes in amplitude (loudness) of the wave forming a noise.