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Chirag Jain

The course aims to explain the basic concepts of sound. The course covers all the topics covered in sound chapter of class 9 NCERT textbook. Some numericals and important questions have also been discussed wherever necessary. The course will help students revise and learn the chapter in a fast and easy way and perform well in school tests and exams. Tags: NCERT Class 9, NCERT class 9 science, NCERT class 9 science notes, Sound class 9, Sound class 9 notes, Sound class 9 NCERT solutions, Sound waves, SONAR, Ultrasound, Reverbaration.

Crack UPSC CSE Prelims and Mains Exams. Know how to prepare for UPSC 2019 and 2020, complete syllabus, exam patterns, latest notifications to join IAS, IFS, IPS and other cadres of Civil Services.

UPSC CSE - GS

UPSC - Civil Services Examination (IAS) Preparation

Hindi

(Hindi) Sound: NCERT Class 9 - Science for UPSC Aspirants

Physics

Class IX

Science and Technology

SSC CGL (Combined Graduate Level) Preparation

NCERT Class 9th Physics

Sci & Tech - NCERT Summary

NCERT Summary

UPSC CSE

Ace the toughest competitive and government exams in India 

Test Preparation

Union Public Service Commission Exams (UPSC)

Science & Technology -  NCERT Summary

This lesson explains what all topics will be covered in the entire course and how the course will help them score better.

Overview of the Course (Hindi)

This lesson explains what is sound , how is sound propogated and also explains the Bell Jar Experiment which proves that sound cannot travel in vacuum.

Understanding Sound with Bell Jar Experiment (in Hindi)

This lesson tells about the speed of light in various medium. It also explains the longtitudinal and transverse waves.

Longtitudinal and Transverse Waves (in Hindi)

This lesson is about the graphical representation of sound waves and characteristics of sound waves.

Sound Waves and its Characteristics (in Hindi)

In this lesson , few numerical problems are discussed. It also describes the reflection of sound and applications of multiple reflections of sound.

Reflection of Sound (in Hindi)

This lesson explains echo in detail and some numerical problems related to echo are also discussed.

Echo (in Hindi)

This lesson deals with reverberation and frequency range of hearing in humans.

Reverberation (in Hindi)

This lesson deals with ultrasound and its applications.

Ultrasound (in Hindi)

This lesson explains the working of SONAR. Some numerical problems have related to SONAR have also been discussed.

SONAR (in Hindi)

This lesson explains the structure and working of the human ear. It also explains the working of hearing aid.

The Human Ear (in Hindi)

I have a Master's degree  in Chemistry. 
I qualified UPSC - CDS examination multiple times and appeared in SSB.Also Cleared state pmt 

Ajit Sharma

In this course, we have discussed chemistry of class 9th.  we  also discussed some MCQs for proper understanding of chapter.

(Hindi) Class 9 NCERT Chemistry Summary: UPSC CSE

cleared CTET, UP TET, AFCAT and IIT JAM in physics,history and science lover and learning enthusiast.

Ayushi Garg

In this course, Ayushi Garg covers all the relevant topics of NCERT class 9 Physics and gives the basic knowledge of Physics for UPSC CSE aspirants and class 9 CBSE students.

(Hindi) Summary of NCERT Class 9 Physics: UPSC CSE

Siva Prasad

All the important concepts in the class 9 NCERT textbook and interlinkeages with the current developments in the field of science and technology

Class 9 NCERT Science - Summary

MSc Physics from M.D.U . I am having 4 year of Teaching Experience {Former faculty of Pioneer Pvt ltd} . Have appeared UPSC CSE. Cleared CDS

Shivani Ahlawat

In this Course, the educator discusses the Gravitational force and Archimedes' principle.

(Hindi) Gravitation: UPSC CSE

M.SC(Chemistry ), B.ED  Kurukshetra University              8+years experience teaching
My Youtube channel:-Science guruji Kapil kadiyan

Kapil Dev

In this course, the educator discusses motion, laws of motion, force, gravitational force etc. The course will be beneficial for UPSC CSE Aspirants.

(Hindi) NCERT Class 9 Physics Summary for UPSC CSE

M.Sc in Biotechnology , B.ed ,Qualified HP Tet.

Shilpa Patial

In this course, the educator discusses some important topics under Class 8 Science for NCERT.

Lessons

10 lessons • 1h 41m

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Overview of the Course (Hindi)

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Understanding Sound with Bell Jar Experiment (in Hindi)

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Longtitudinal and Transverse Waves (in Hindi)

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Sound Waves and its Characteristics (in Hindi)

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Reflection of Sound (in Hindi)

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Echo (in Hindi)

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Reverberation (in Hindi)

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Ultrasound (in Hindi)

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SONAR (in Hindi)

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The Human Ear (in Hindi)