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Infrasonic Waves : Class 9 Science MCQ Practice Questions & Answers (English) - ObjectiveMcq

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PracticeClass 9 SciencePhysicsSoundInfrasonic Waves

Infrasonic Waves in Class 9 Science : Practice MCQ Questions & Answers with Explanations

1 practice sets · Page 1 of 1

Class 9 ScienceMediumPhysics SoundInfrasonic Waves

1.

Which of the following is an example of infrasonic sound?

A

Whale sounds

B

Earthquake tremors

C

Bat communication

D

Human speech

Correct Answer:

B — Earthquake tremors

Explanation:

Earthquake tremors produce infrasonic waves with frequencies below 20 Hz.