MCQ Science and Technology Class 9 Chapter 12 Maharashtra Board Study of Sound 1. What creates the sensation of hearing in our ears according to the document?SoundLightHeatElectricityQuestion 1 of 202. What is sound in the form of, as per the document?ParticlesWavesRaysFieldsQuestion 2 of 203. What does a sound wave produce in the medium?Electric chargesCompression and rarefactionMagnetic fieldsLight beamsQuestion 3 of 204. In longitudinal sound waves, how do particles oscillate relative to the wave’s propagation?PerpendicularParallelCircularlyRandomlyQuestion 4 of 205. What type of waves are produced when a stone is dropped in still water?LongitudinalTransverseElectromagneticSonicQuestion 5 of 206. What does the amplitude of a sound wave represent?Frequency of the waveMaximum value of pressure or densityWavelength of the waveTime period of oscillationQuestion 6 of 207. What is the time period of a sound wave?Time for one wavelength to passTime for one oscillation of pressure or densityTime for sound to travel 1 meterTime between two compressionsQuestion 7 of 208. What Greek letter indicates the frequency of a sound wave?Lambda (λ)Nu (υ)Alpha (α)Beta (β)Question 8 of 209. What does the frequency of a sound wave determine?LoudnessPitchSpeedAmplitudeQuestion 9 of 2010. What does the amplitude of a sound wave determine?PitchLoudnessWavelengthVelocityQuestion 10 of 2011. In the iron pipe activity, why does sound travel faster through the pipe than air?Air is denserIron is a solid mediumAir has higher temperatureIron absorbs soundQuestion 11 of 2012. How is the velocity of a sound wave calculated?Distance ÷ TimeFrequency × WavelengthAmplitude × FrequencyWavelength ÷ TimeQuestion 12 of 2013. In which medium is the velocity of sound lowest?SolidsLiquidsGasesVacuumQuestion 13 of 2014. What happens to the velocity of sound as the temperature of the medium increases?DecreasesIncreasesRemains constantBecomes zeroQuestion 14 of 2015. What method did Borelli and Viviani use to calculate the speed of sound?Measuring echo timeTiming the flash and sound of a gunUsing a pendulumObserving water wavesQuestion 15 of 2016. How does the velocity of sound in a gas depend on temperature?Directly proportional to temperatureDirectly proportional to the square root of temperatureInversely proportional to temperatureInversely proportional to the square root of temperatureQuestion 16 of 2017. How does the velocity of sound in a gas depend on density?Directly proportional to densityInversely proportional to the square root of densityDirectly proportional to the square root of densityInversely proportional to densityQuestion 17 of 2018. How does the velocity of sound in a gas depend on molecular weight?Directly proportional to molecular weightInversely proportional to the square root of molecular weightDirectly proportional to the square root of molecular weightInversely proportional to molecular weightQuestion 18 of 2019. Does the velocity of sound in a gas depend on pressure at a fixed temperature?Yes, it increases with pressureYes, it decreases with pressureNo, it does not depend on pressureIt depends only on high pressureQuestion 19 of 2020. What is the frequency range of audible sounds for humans?10 Hz to 10,000 Hz20 Hz to 20,000 Hz30 Hz to 30,000 Hz5 Hz to 5,000 HzQuestion 20 of 20 Loading...
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