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Speed Of Sound : Class 9 Science MCQ Practice Questions & Answers (Tamil) - ObjectiveMcq

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PracticeClass 9 SciencePhysicsSoundSpeed Of Sound

Speed Of Sound in Class 9 Science : Practice MCQ Questions & Answers with Explanations

3 practice sets · Page 1 of

1

Class 9 ScienceMediumPhysics SoundSpeed Of Sound

1.

What is the speed of sound in steel approximately?

A

1500 m/s

B

343 m/s

C

6000 m/s

D

5000 m/s

Correct Answer:

C — 6000 m/s

Explanation:

The speed of sound in steel is approximately 6000 m/s.

Class 9 ScienceMediumPhysics SoundSpeed Of Sound

2.

Why is the speed of sound in solids higher than in gases?

A

Particles in solids are closely packed

B

Solids are more rigid

C

Solids are more elastic

D

All of the mentioned

Correct Answer:

D — All of the mentioned

Explanation:

Close particle packing, rigidity, and elasticity make sound travel faster in solids.

Class 9 ScienceMediumPhysics SoundSpeed Of Sound

3.

In which medium is the speed of sound the highest?

A

Solids

B

Gases

C

Liquids

D

Vacuum

Correct Answer:

A — Solids

Explanation:

Sound travels fastest in solids because particles are closely packed.