Draw a waveform for noise.

Important Questions on Sound

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 2

State the factors that determine the pitch of a sound.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 3

The skin of a tabla is tightened to produce shrill sound. Give reasons.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 4

A loud sound is produced by striking a drum harder. Give reasons.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 5

How is the loudness of sound related to the density of medium?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 6

The loudness of a whisper is $20 \mathrm{dB}$ and that of a conversation is $60 \mathrm{dB}$. How many times is the sound of conversation louder than a whisper?

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 7

The loudness of a whisper is $20 \mathrm{dB}$. The sound of shouting is about ${10}^5$ times louder than whisper. What is the loudness of shouting? 

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 8

What is noise pollution? How is it caused?

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE PHYSICS 9>Chapter 6 - Sound>Check Your Progress>Q 9

What are the harmful effects of noise pollution?