MCQ Class 8 Science Chapter 10 Sound Advertisement MCQ’s For All Chapters – Science Class 8th 1. The voice box is also called asstomachheartlarynxmouthQuestion 1 of 202. Sound is a kind ofworkenergyforcepressureQuestion 2 of 203. The hearing range of human ear is20 Hz to 20,000 Hzless than 20 Hzmore than 20,000 Hz20 Hz to 25,000 HzQuestion 3 of 204. Pitch of sound is determined by itsfrequencyspeedamplitudeloudnessQuestion 4 of 205. The frequency of subsonic sound ismore than 20 Hz100 Hzless than 20 Hzmore than 20,000 HzQuestion 5 of 206. Cochlea is a part ofhearing organsound producing organmuscular organair pollutionQuestion 6 of 207. 1 hertz is equal to1 oscillation per second10 vibrations per minute50 vibrations per minute600 vibrations per minuteQuestion 7 of 208. Sound cannot travel throughairwatervacuumQuestion 8 of 209. The sound in the audible range is calledultrasonic soundsonic soundsubonic soundlight soundQuestion 9 of 2010. Speed isDistancetravelled/TimeTime/DistancetravelledDistance travelled × TimeTime + Distance travelledQuestion 10 of 2011. A pendulum oscillates 20 times in 4 seconds. Find its time period.5 sec.0.001 sec.0.2 sec.0.1 secQuestion 11 of 2012. Loudness of sound is determined bypitchfrequencyamplitudetime periodQuestion 12 of 2013. The number of vibrations made by a vibrating body in one second isfrequencynoiseloudnesspitchQuestion 13 of 2014. The maximum displacement of a body from its mean position is calledamplitudeoscillationperiodic motionfrequencyQuestion 14 of 2015. The velocity of sound at 20°C is approximately3400 m/sec.340 m/sec.430 m/sec.343 m/sec Question 15 of 2016. Sound is produced byNon-Vibrating objects onlyVibrating and non- vibrating objectsVibration has no relation to soundVibrating objects onlyQuestion 16 of 2017. Sound cannot travel throughvacuumairwatersolidsQuestion 17 of 2018. Vibration is also known asVibratory motionTranslatory motionOscillatory motionNone of theseQuestion 18 of 2019. Frequency is expressed inKilometerHertzgramDegree centigradeQuestion 19 of 2020. The number of oscillations per second is calledAmplitude of oscillationPitch of oscillationFrequency of oscillationNone of the aboveQuestion 20 of 20 Loading...
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