Class 7 Science MCQs - Chapter 24
Sound Waves Quiz Questions and Answers PDF - 19
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The Quiz: Who discovered the 'Korotkoff' sounds; "Sound Waves" App Download iOS & Android (Free) with answers dr.nikolai korotkoff, isaac newton, michael faraday and thomas silva edison to learn homeschool online courses. Study all around sounds quiz questions, download Amazon eBook (Free Sample) for online school and college.
Sound Waves Questions & Answers PDF Download: MCQ Quiz 19
MCQ 91: Who discovered the 'Korotkoff' sounds?
- Isaac Newton
- Dr.Nikolai Korotkoff
- Michael Faraday
- Thomas Silva Edison
MCQ 92: The parts of sound waves where air pressure is lesser, is known as
- compression
- rarefaction
- consolation
- expansion
MCQ 93: The pleasant sound of music depends on its
- amplitude
- frequency
- wavelength
- volume
MCQ 94: The lowest level of frequency a human ear can detect, is
- 2 Hz
- 20 Hz
- 20kHz
- 2kHz
MCQ 95: We can hear the voice of alarm clock when there is
- vacuum in the jar
- air in the jar
- liquid in the jar
- space in the jar
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