# PTB 10th Class Physics Unit 11 ‘Sound’ Solved Questions/Numerical

View and Download the solved conceptual questions, solved numerical problems or 10th Class Physics notes of Chapter 11 “Sound” of Punjab Textbook Board. These 10th class physics notes of 10th Chapter are according to the new syllabus (2018) of Punjab Boards including Lahore Board, Gujranwala Board, Sahiwal Board, Rawalpindi Board, Faisalabad Board, Multan Board, Bahawalpur Board, Federal Board, DG Khan Board and Sargodha Board. Students of 10th Class of all these board can facilitate from the physics notes given below. You can also download 10th Class Physics Chapter 11 Solved Questions and Numericals Problems.

### Unit 11: Sound

Chapter 11
Sound is one of the basic communication channel between human and it’s a vibration of waves in actual.
Why humans are not able to listen some kind of sounds, and other type of sound effect human ear. We have learnt frequency of waves in Chapter 11, so frequency of sound waves also matter to be audible or not.
In this chapter students will learn about how Sound is produced mostly by vibrating resources and sound waves require a medium to propagate. Concept of longitudinal nature of sound waves is described beautifully in this chapter. Defining important terms pitch, loudness and quality of sound is very important for students to learn.
Students will also be able to learn effect of change in amplitude on loudness and effect of change of frequency on the pitch of sound. Intensity of sound is very important and SI Unit of it. Students will learn about concept how reflection of sound produce echo audible frequency range.
Science, Technology and Society Connection
Importance of acoustic protection. Some sounds are injurious to health and by studying this chapter students will be able to identify those sounds.
Concepts how ultrasound techniques are used in medical and industry. Use of soft material to reduce echo in classroom studies and other public gathering buildings.Solve numerical problems based on the mathematical relations learnt in this unit.

#### 10th Class Physics Chapter 11 (Sound) Review Short Question Answers

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