Class 10 Physics MCQs – Practice Test 17 (Chapter 9)

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The "Sound MCQs" App Download: Intensity level of the faintest audible sound is; MCQ with answers: 0 db, 25 db, 10 db, and 100 db. Solve Sound Waves in Physics MCQ Questions, download Google e-Book (Free Chapter) to improve learning ability.

Sound MCQs PDF Download – Practice Test 17

MCQ 81: If a doctor counts 80 heartbeats in 1 minute, then the frequency of heartbeats should be:

1.33 Hz
1.99 Hz
1.39 Hz
2.33 Hz

MCQ 82: The intensity level of the faintest audible sound is:

25 dB
0 dB
10 dB
100 dB

MCQ 83: Stethoscopes operate on the transmission of:

electricity
signals
light
sound

MCQ 84: A safe level of noise depends on:

level of noise and exposure to noise
area
pitch
frequency

MCQ 85: Ultrasonic waves are very useful for detecting:

large objects
small objects
gases
none of above

Class 10 Physics MCQs App & e-Book – Sound Study Guide

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