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9th CBSE
IMPORTANT
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Represent graphically by two separate diagrams in each case: Two sound waves having the same amplitude but different frequencies.

Important Questions on Sound

EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>NCERT Exemplar Problems>Q 18
Represent graphically by two separate diagrams in each case: Two sound waves having the same frequency but different amplitudes.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>NCERT Exemplar Problems>Q 18
Represent graphically by two separate diagrams in each case: Two sound waves having different amplitudes and also different wavelengths.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>NCERT Exemplar Problems>Q 19
Establish relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 ms-1, calculate wavelength when frequency is 256 Hz.
MEDIUM
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>NCERT Exemplar Problems>Q 19
Establish relationship between speed of sound, its wavelength and frequency. If velocity of sound in air is 340 ms-1, calculate frequency when wavelength is 0.85 m.
MEDIUM
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>NCERT Exemplar Problems>Q 20
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 wavelength and time period using this curve.
EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Value Based Questions>Q 1

A pregnant lady was asked to get ultrasound done to check the growth of baby and have a visual image of placenta, uterus and pelvic organs. She got worried thinking that such a test will harm the baby. But the doctor explained the technique used in ultrasound, and ultimately she got convinced. Now answer the following questions:

What is ultrasound?

EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Value Based Questions>Q 1

A pregnant lady was asked to get ultrasound done to check the growth of baby and have a visual image of placenta, uterus and pelvic organs. She got worried thinking that such a test will harm the baby. But the doctor explained the technique used in ultrasound and ultimately she got convinced. Now answer the following questions:

How is ultrasound imaging done?

EASY
9th CBSE
IMPORTANT
Essentials of PHYSICS Class IX>Chapter 5 - Sound>Value Based Questions>Q 1

A pregnant lady was asked to get ultrasound done to check the growth of baby and have a visual image of placenta, uterus and pelvic organs. She got worried thinking that such a test will harm the baby. But the doctor explained the technique used in ultrasound and ultimately she got convinced. Now answer the following questions.

What are the values shown by the mother?