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

Sound MCQs with Answers PDF Download – Test 21

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Learn Sound Multiple Choice Questions (MCQs) with Answers PDF to achieve academic excellence. Download the Sound MCQs PDF e-Book, Ch. 9-21 to study Class 10 Physics Course. Learn Sound Quiz Questions and Answers to enhance exam scores. Free Class 10 Physics Study App: Download the Sound MCQs App to characteristics of sound, noise pollution, sound waves in physics, echo of sound test prep for remote educational development programs.

Study Class 10 Physics Study App Download with MCQ: "A normal conversation have sound intensities of 3×10^-6Wm^-2. decibel level for the intensity is"; with answers: 64.8 db, 50 db, 70.5 db, and 48.8 db. Solve Characteristics of Sound MCQ Questions, download Google e-Book (Free Chapter) to achieve academic excellence.

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

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