of a mixture of several frequencies.

of mixture of only two frequencies.

Consider the following sound waves marked A , B , C and D : Which two waves represent sounds of the same loudness but different pitch?

The waves A and D same loudness but different pitch. Loudness depends on amplitude which is the maximum displacement of the particle from its mean position. In the given figure A and D , wave is covering two blocks up from mean position and similarly two blocks down from mean position. These two wave have the different pitch as they have different frequency. The number of oscillations covered by both the waves in unit time is different. So, they have the different pitch. In other word, we can also say that these two waves covering different wavelengths in same time, so, they have different pitch.

E M B I B E

Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Long Answer Type Questions>Q 68

MEDIUM

9th CBSE

IMPORTANT

Earn 100

Draw a neat and labelled diagram of the human ear. With the help of this diagram, explain the construction and working of the human ear.

Important Questions on Sound

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Multiple Choice Questions (MCQs)>Q 70

When we change a feeble sound to a loud sound, we increase its:

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Multiple Choice Questions (MCQs)>Q 73

Note is a sound:

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Multiple Choice Questions (MCQs)>Q 78

The ultrasound waves can penetrate into matter to a large extent because they have :

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Questions Based on High Order Thinking Skills (HOTS)>Q 85

The drawing shows a ship

800 m

from a cliff. A gun is fired on the ship. After

5

seconds the people at the front of the ship hear the sound of the gun again.

What is the name of this effect?

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Questions Based on High Order Thinking Skills (HOTS)>Q 85

The drawing shows a ship

800 m

from a cliff. A gun is fired on the ship. After

5

seconds the people at the front of the ship near the sound of the gun again.

What happens to the sound at the cliff?

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Questions Based on High Order Thinking Skills (HOTS)>Q 85

The drawing shows a ship $800 m$ from a cliff. A gun is fired on the ship. After $5$ seconds the people at the front of the ship hear the sound of the gun again.

How far does the sound travels in $5$ seconds?

EASY

9th CBSE

IMPORTANT

Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Questions Based on High Order Thinking Skills (HOTS)>Q 85

The drawing shows a ship $800 m$ from a cliff. A gun is fired on the ship. After $5$ seconds the people at the front of the ship hear the sound of the gun again.