Class 10 Physics MCQs - Chapter 9

Sound Multiple Choice Questions (MCQs) PDF Download - 21

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Free Sound Multiple Choice Questions and Answers (MCQs), sound MCQ PDF Download, Book Ch. 9-21 to study class 10 physics online courses. Practice Characteristics of Sound MCQs PDF, sound quiz questions and answers to learn online certification courses. The Sound MCQs App Download: Free learning app for characteristics of sound, noise pollution, sound waves in physics, echo of sound test prep for online teaching certification programs.

The Multiple Choice Question (MCQ Quiz): A normal conversation have sound intensities of 3×10^-6Wm^-2. decibel level for the intensity is; "Sound" App Download (Free) with answers 64.8 db, 50 db, 70.5 db and 48.8 db to learn online certification courses. Solve characteristics of sound quiz questions, download Google eBook (Free Sample) for distance learning classes.

Sound Questions & Answers PDF Download: MCQ Quiz 21

MCQ 101: A normal conversation have sound intensities of 3×10^-6Wm^-2. The decibel level for the intensity is

50 dB
64.8 dB
70.5 dB
48.8 dB

MCQ 102: The level of noise recommended in most countries over an eight-hour workday is usually

65-70 dB
85-90 dB
75-80 dB
45-50 dB

MCQ 103: If a nurse counts 68 heartbeats in 1 minute, then the period of heartbeats should be

1.9 s
2 s
0.88 s
3 s

MCQ 104: Human voice results from the vibration of

ears
heart
vocal chords
muscles

MCQ 105: As compare to air, sound waves travel

3 times faster
5 times slower
5 times faster
2 times lower

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