28/03/2020Sound Waves(Senior Class Physics Study by Topics) 0Comments by Gate Academy Welcome to your Sound Waves(Senior Class Physics Study by Topics) NAME EMAIL PHONE NUMBER 1. What is the unit of loudness?All of the aboveBelPhonDecibel2. A key of mechanical piano is first struck gently and then struck again but much harder this time. What kind of change in sound will you observe in the second case:Both loudness and pitch will remain unaffectedSound will be louder but the pitch will not be differentSound will be louder but the pitch will be lowerSound will be louder and the pitch will also be higher3. The higher the amplitude, the __________________ the sound.LouderLowerHigherQuieter4. In this animation, what type of wave is shown?LightRefractedLongitudinalTransverse5. Loudness measures the sound energy reaching the ear per second and depends on the amplitude of the sound wave. What is the unit used to measure the loudness of sound?SecondDecibelMeter/secondHertz6. All waves except __________ waves must travel through a medium.SoundLightCompressionalWater7. Due to which phenomena sound is heard at longer distances in nights than in day?Interference of soundDiffraction of soundReflectionRefraction8. The type of wave shown is a __________ wave.SoundTransverseLightLongitudinal9. Name the characteristic of the sound which distinguishes a sharp sound from a grave or dull sound?EchoResonanceIntensityPitch10. If the speed of a wave is 380 m/s and its frequency is 1900 Hz, then the wavelength of the wave will be:200 m2 m20 m0.2 m11. In this animation what kind of interference is shown?ConstructiveReflectionDestructiveRefraction12. Sound does not travel in space becauseNo air, so there is no medium to travel through.Too darkToo many asteroidsWhat?13. If a sound wave travels 5 meters in 0.01567 seconds, what is the speed of the sound wave?5.01567 m/s0.07835 m/s319 m/s4.984 m/s14. The material that a wave travels through is called theReflectionMediumSpeedRefraction15. When a motor boat in a sea travels faster than sound, then waves just like shock-waves are produced on the surface of water. These waves are called ..............Shock wavesDoppler's wavesRefracted wavesBow waves16. Given below is the diagram of human ear. Choose the correct labeling of the parts A, B and C.A-ear canal, B-Eustachian tube, C-auditory nerveA-ear drum, B-auditory nerve, c-ear canalA-ear lobe, B-ear canal, C-auditory nerveA-ear canal, B-Eustachian tube, C-cochlea17. The echo-receiver of a sonar attached to a ship, receives the echo from the bottom of sea 4 seconds after the ultrasonic waves were sent into the sea. If the speed of sound in water is 1500 m/s, then what is the depth of the sea?15000 m3000 m3500 m6000 m18. The lower the frequency, the _____________ the sound.LouderQuieterLowerHigher19. Which of the following can produce longitudinal as well as transverse waves under different conditions?None of theseBatsSlinkyTuning fork20. Sound travels best through ___________________.SolidWaterAir21. A movement back and forth that produces sound is called _____________AirSoundVibration22. _________________ is the highness or lowness of a sound.PitchVolumeTension23. Which of the following is not a type of electromagnetic wave?Red lightRadio wavesSoundGamma rays24. Another term for a sound reflection off of a wall or other object through which a sound wave cannot pass isEchoReverbAmplitudeVibration25. On increasing the temperature, the speed of sound in air:Does not changeIncreasesFirst increases then becomes constantDecreases26 out of 25Time is Up!