MCQ Chapter 15 General Science Class 8 Maharashtra Board MCQ For All Chapters – General Science Class 8Sound 1. What is the main source of sound production described in the document?Static objectsVibrating objectsMoving airElectric currentsQuestion 1 of 202. What are the two main parts of a tuning fork mentioned in the document?Base and handleProngs and stemHead and bodyArms and legsQuestion 2 of 203. What happens to the air outside the prongs when they move apart during vibration?It becomes rarefiedIt remains unchangedIt is compressedIt disappearsQuestion 3 of 204. What is the term for a region of high pressure and high density in a sound wave?RarefactionCompressionVibrationPropagationQuestion 4 of 205. What is created in the air when the prongs of a tuning fork come close to each other?CompressionHigh densityRarefactionSound wavesQuestion 5 of 206. What propagates away from the tuning fork prongs as a result of their periodic motion?Air moleculesSound wavesElectric signalsLight wavesQuestion 6 of 207. What vibrates in the ear when sound waves reach it?Ear canalEar-drumBrainCochleaQuestion 7 of 208. What is required for the generation and propagation of sound according to the bell jar experiment?VacuumMediumElectricityLightQuestion 8 of 209. What happens to the sound of the electric bell as air is removed from the bell jar?It increasesIt remains the sameIt decreasesIt becomes sharperQuestion 9 of 2010. Why can’t astronauts hear each other directly on the moon?They are too far apartThere is no medium like airTheir helmets block soundSound waves are too weakQuestion 10 of 2011. What moves away from the source in a sound wave, as asked in the ‘Use your brain power’ section?The air itselfThe source objectThe state of compression and rarefactionThe tuning forkQuestion 11 of 2012. What is the unit of frequency mentioned in the document?DecibelHertzMeterSecondQuestion 12 of 2013. If a tuning fork vibrates 512 times per second, what is its frequency?256 Hz512 Hz1000 Hz128 HzQuestion 13 of 2014. What determines the frequency of a tuning fork?Its colorDimensions of prongs and materialThe air pressure around itThe force of the strikeQuestion 14 of 2015. Why does each glass cup in the ‘Jaltarang’ experiment produce a different sound?Different striking forceDifferent air column heightsDifferent glass colorsDifferent pencil sizesQuestion 15 of 2016. In string-based instruments like the guitar, how is the frequency of vibration changed?By changing the air pressureBy altering tension or length of the stringBy blowing airBy striking harderQuestion 16 of 2017. How does a flute change its sound notes?By changing string tensionBy opening or closing holesBy striking the bodyBy increasing air temperatureQuestion 17 of 2018. Where is sound produced in humans?LungsThroatLarynxMouthQuestion 18 of 2019. What vibrates in the human larynx to produce sound?EpiglottisVocal cordsTracheaEsophagusQuestion 19 of 2020. What can muscles do to the vocal cords to change sound quality?Make them longerMake them tight or looseMake them thickerMove them apartQuestion 20 of 20 Loading...
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