Class 10 Physics Competitive Exam MCQs – Practice Test 21 (Chapter 9)

Sound MCQs with Answers PDF Download – Test 21

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The Sound Multiple Choice Questions (MCQs) with Answers PDF (Sound MCQs PDF e-Book) download Ch. 9-21 to study Class 10 Physics Course. Learn Sound Quiz Questions and Answers to learn online certification courses. The Class 10 Physics MCQs App Download: Free Sound App for characteristics of sound, noise pollution, sound waves in physics, echo of sound test prep for online teaching certification programs.

The MCQ: A normal conversation have sound intensities of 3×10^-6Wm^-2. The decibel level for the intensity is; "Class 10 Physics MCQs" 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 MCQ Questions, download Google e-Book (Free Chapter) for distance learning classes.

Sound MCQs – Practice Test 21 PDF Download

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

Sound Competitive Exam – Class 10 Physics App & e-Book MCQs

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