Class 10 Physics Exam MCQs – Practice Test 4 (Chapter 9)

Sound Notes Questions with Answers PDF Download – Test 4

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The MCQ: To communicate with each other, Elephants use; "Sound" App APK Download with answers: low frequency light waves, low frequency sound waves, high frequency sound waves, and low frequency heat waves for high school certification courses. Practice Echo of Sound MCQ Questions, download Kobo e-Book (Free Chapter) for online school courses.

Sound MCQs – Practice Test 4 PDF Download

MCQ 16: To communicate with each other, Elephants use:

low frequency sound waves
low frequency light waves
high frequency sound waves
low frequency heat waves

MCQ 17: The technique or method to absorb undesirable sounds by soft and porous surface is called:

acoustic protection
unacoustic protection
audible protection
decibel protection

MCQ 18: A normal human ear can hear a sound only if its frequency lies between:

30 Hz to 30,000 Hz
50 Hz to 50,000 Hz
20 Hz to 20,000 Hz
10 Hz to 10,000 Hz

MCQ 19: The speed of sound in air is:

343ms^-1
343ms^-2
341ms^-1
250ms^-1

MCQ 20: The speed of sound can be found by relation:

v = cλ
v = ma
v = fλ
f=¹ ⁄ _T

Sound Exam Prep – Class 10 Physics Notes App & e-Book

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