This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 17 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which property of light causes a rainbow to form? A) Diffraction. B) Reflection. C) Absorption. D) Refraction. Show Answer Correct Answer: D) Refraction. 2. Which phenomenon occurs when two waves traveling in the same direction overlap and their crests combine to produce a larger wave? A) Diffraction. B) Constructive interference. C) Refraction. D) Destructive interference. Show Answer Correct Answer: B) Constructive interference. 3. How to get period per swing A) Subtract the swings from T. B) Add T to the total swings. C) Multiply the number of swings by T. D) T divide the amount of swings u did. Show Answer Correct Answer: D) T divide the amount of swings u did. 4. Explain how increasing the frequency of a wave affects its energy. A) Energy decreases. B) Energy remains constant. C) Energy increases. D) Energy becomes random. Show Answer Correct Answer: C) Energy increases. 5. Which part of the electromagnectic spectrum is necessary for the sense of sight in humans? A) Visible light. B) Gamma rays. C) Radio waves. D) Infrared light. Show Answer Correct Answer: A) Visible light. 6. The human audible frequency range is approximately: A) 20 Hz to 20, 000 Hz. B) 1 Hz to 10 Hz. C) 10 Hz to 100 Hz. D) 50 Hz to 50, 000 Hz. Show Answer Correct Answer: A) 20 Hz to 20, 000 Hz. 7. Light of wavelength 500 nm is incident on a metalwith work function 2.28 eV. The de Brogliewavelength of the emitted electron is:- A) $\le2.8\times10^{-12}m$. B) $\ge2.8\times10^{-9}m$. C) $<2.8\times10^{-12}m$. D) $<2.8\times10^{-9}m$. Show Answer Correct Answer: B) $\ge2.8\times10^{-9}m$. 8. What is the speed of a wave dependent on? A) The amplitude of the wave. B) The wavelength of the wave. C) The frequency of the wave. D) The medium through which the wave is traveling. Show Answer Correct Answer: D) The medium through which the wave is traveling. 9. A medium is the substance a wave travels through A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. Sound has to travel through a A) Crest. B) Frequency. C) Box. D) Medium. Show Answer Correct Answer: D) Medium. 11. What is the frequency of a wave that has a wavelength of 2.5m traveling at a speed of 750m/s A) 1, 875 Hz. B) 747.5 Hz. C) 0.0033 Hz. D) 300 Hz. Show Answer Correct Answer: D) 300 Hz. 12. Which type of wave is fastest? A) Water. B) Sound in water. C) Sound in air. D) Light. Show Answer Correct Answer: D) Light. 13. The matter (solid, liquid, or gas) through which waves can travel A) Medium. B) Object. C) Transverse Wave. D) Wavelength. Show Answer Correct Answer: A) Medium. 14. How does the speed of light change when it enters a denser medium? A) The speed of light becomes infinite in a denser medium. B) The speed of light decreases when it enters a denser medium. C) The speed of light increases when it enters a denser medium. D) The speed of light remains constant regardless of the medium. Show Answer Correct Answer: B) The speed of light decreases when it enters a denser medium. 15. Which of these properties allows you to see the moon at night, see yourself in a mirror and hear an echo A) Diffraction. B) Refraction. C) Reflection. D) Interference. Show Answer Correct Answer: C) Reflection. 16. Which of the following is a true statement concerning the relationship between the wavelength and the frequency? A) Increasing the frequency will increase the wavelength. B) Increasing the frequency will have no effect on the wavelength. C) The frequency and the wavelength will always remain constant. D) Increasing the frequency will decrease the wavelength. Show Answer Correct Answer: D) Increasing the frequency will decrease the wavelength. 17. Which is not an example of a damping force? A) Viscosity. B) Air resistance. C) Inertia. D) Friction. Show Answer Correct Answer: C) Inertia. 18. What is the wavelength of a sound wave? A) The wavelength of a sound wave depends on its frequency and the speed of sound in the medium. B) Wavelength is only determined by the temperature of the medium. C) Sound waves do not have a wavelength. D) The wavelength of a sound wave is always constant. Show Answer Correct Answer: A) The wavelength of a sound wave depends on its frequency and the speed of sound in the medium. 19. A signal has a frequency of 2.0 MHz.What is the period of the signal? A) 500ns. B) 2$\mu$s. C) 200ns. D) 5$\mu$s. Show Answer Correct Answer: A) 500ns. 20. The ..... of waves can change when the waves move from one medium to another. A) Altitude. B) Speed. C) Amplitude. D) Compression. Show Answer Correct Answer: B) Speed. 21. What does "frequency" measure in a wave? A) Height. B) Speed. C) Cycles per second. D) Distance. Show Answer Correct Answer: C) Cycles per second. 22. Which of the following colors has the longest wavelength? A) Orange. B) Violet. C) Red. D) Blue. Show Answer Correct Answer: C) Red. 23. Please select the choice that correctly identifies the wave characteristic that describes the pitch of a sound and how loud that sound is. A) Pitch:FrequencyLoudness:Amplitude. B) Pitch:PeriodLoudness:Frequency. C) Pitch:WavelengthLoudness:Amplitude. D) Pitch:AmplitudeLoudness:Frequency. Show Answer Correct Answer: A) Pitch:FrequencyLoudness:Amplitude. 24. In which medium is the wavelength of red light the shortest? A) Diamond. B) Zircon. C) Crown Glass. D) Flint Glass. Show Answer Correct Answer: A) Diamond. 25. A simple harmonic oscillator takes 4.8 s to undergo five complete wave cycles. What is the frequency of the wave? A) 1.04 Hz. B) 4.8 Hz. C) 1/4.8 Hz. D) None of the above. Show Answer Correct Answer: A) 1.04 Hz. 26. When light enters a more optically dense medium it refracts ..... A) Towards the normal. B) Away from the normal. C) All the above. D) None of the above. Show Answer Correct Answer: A) Towards the normal. 27. How many wavelengths are created in a closed-closed tube vibrating at its 3rd harmonic? A) 1. B) 1/2. C) 2. D) 3/2. Show Answer Correct Answer: D) 3/2. 28. ..... occurs when two waves combine to form a new wave. A) Resonance. B) Interference. C) Compression. D) Reflection. Show Answer Correct Answer: B) Interference. 29. Sound is an example of which type of wave? A) Transverse. B) Longitudinal. C) Both. D) Neither. Show Answer Correct Answer: B) Longitudinal. 30. What is the de Broglie wavelength of a person of mass 60kg moving at a speed of 2ms$^{-1}$? A) 1.58 x 10$^{42}$m. B) 3.68 x 10$^{-44}$m. C) 5.52 x 10$^{-36}$m. D) 7.95 x 10$^{-32}$m. Show Answer Correct Answer: C) 5.52 x 10$^{-36}$m. 31. Sound waves are also called ..... because they move side to side. A) Amplitude Waves. B) Longitudinal Waves. C) Transverse Waves. D) Tidal Waves. Show Answer Correct Answer: B) Longitudinal Waves. 32. The disturbance of a wave travels farther than its medium. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 33. It is the apparent change in frequency (or wavelength) that occurs because of motion of the source or observer of a wave A) Waves fronts. B) Transmission. C) Frequency Effect. D) None. Show Answer Correct Answer: D) None. 34. What does a progressive wave do? A) Creates energy. B) Transfers energy from one place to another. C) Stops energy transfer. D) Stores energy. Show Answer Correct Answer: B) Transfers energy from one place to another. 35. You can calculate the speed of a wave by dividing the wavelength ..... A) Period. B) Time. C) Frequency. D) Lambda. Show Answer Correct Answer: A) Period. 36. What happens when a wave bends as it passes through a different medium? A) Absorption. B) Reflection. C) Refraction. D) Diffraction. Show Answer Correct Answer: C) Refraction. 37. Whenever there is complete destructive interference between two coherent wave trains, the waves must be A) In phase. B) Out of phase by one wavelength. C) Out of phase by a quarter of a wavelength. D) Out of phase by half of a wavelength. Show Answer Correct Answer: D) Out of phase by half of a wavelength. 38. It is the highest point of a wave. A) Trough. B) Amplitude. C) Wavelength. D) Crest. Show Answer Correct Answer: D) Crest. 39. If a wave is traveling at 60m/s and has a wavelength of 3m. What is the frequency? A) 10Hz. B) 20Hz. C) 180Hz. D) None of the above. Show Answer Correct Answer: B) 20Hz. 40. An airplane that goes slower than the speed of sound A) Subsonic. B) Supersonic. C) Hypersonic. D) None of the above. Show Answer Correct Answer: A) Subsonic. 41. The properties that waves have that determine their behaviour are: A) Frequency, period, wavelength, and amplitude. B) Frequency and amplitude. C) Period and wavelength. D) Frequency. Show Answer Correct Answer: A) Frequency, period, wavelength, and amplitude. 42. What occurs when light rays deviate from their original path upon striking an obstacle? A) Refraction. B) Reflection. C) Scattering. D) Radiation. Show Answer Correct Answer: C) Scattering. 43. Waves transfer (a) A) Atoms. B) A. Energy. C) Molecules. D) Matter. Show Answer Correct Answer: B) A. Energy. 44. What happens to the pitch of a sound wave when the frequency increases? A) The pitch increases. B) The pitch becomes softer. C) The pitch decreases. D) The pitch remains the same. Show Answer Correct Answer: A) The pitch increases. 45. Which of the following would have the highest amplitude? A) A dog barking. B) Clapping your hands. C) Knocking on a door. D) Thunder. Show Answer Correct Answer: D) Thunder. 46. What does the amplitude of a pendulum measure? A) The distance from the top of the string to the mass at the end of the pendulum. B) Where the force of gravity takes affect. C) How fast the pendulum moves back and forth. D) The distance from the highest point to the equilibrium point. Show Answer Correct Answer: D) The distance from the highest point to the equilibrium point. 47. What is DIFFRACTION? A) Diffraction occurs when waves pass through a gap or around an object. B) Diffraction occurs when a wave bounces back. C) Diffraction occurs when it looks into the mirror and smiles. D) Diffraction occurs when a wave is distracted and moves randomly. Show Answer Correct Answer: A) Diffraction occurs when waves pass through a gap or around an object. 48. The energy of a sound wave is proportional to the square of its A) Amplitude. B) Wavelength. C) Frequency. D) Speed. Show Answer Correct Answer: A) Amplitude. 49. An electromagnetic wave is different than a mechanical wave in that an electromagnetic wave ..... (unlike a mechanical wave). A) Has a non-measurable speed. B) Can travel through a variety of media. C) Has a constant speed when traveling through any medium. D) Can propagate through a region void of matter. Show Answer Correct Answer: D) Can propagate through a region void of matter. 50. What is the speed of a wave that has a wavelength of 2 meters and a frequency of 100 Hz? A) 100 m/s. B) 50 m/s. C) 200 m/s. D) 20 m/s. Show Answer Correct Answer: C) 200 m/s. 51. Which type of radio waves is reflected off the ionosphere? A) Long-wave. B) Short-wave. C) All the above. D) None of the above. Show Answer Correct Answer: B) Short-wave. 52. To find the ..... of a wave, measure the distance from one trough to the next trough. A) Interference. B) Wavelength. C) Frequency. D) Amplitude. Show Answer Correct Answer: B) Wavelength. 53. Bending of waves around an object (such as through a doorway) A) Sound. B) Pitch. C) Diffract. D) Volume. Show Answer Correct Answer: C) Diffract. 54. What is the method to investigate the speed of sound in air using the echo method? A) Shine light through a glass block and measure the angles of refraction. B) Create interference patterns using a microphone and an oscilloscope. C) Blow air into a tube and measure the frequency of the sound produced. D) Strike two blocks together and measure the time taken for the sound to travel a distance. Show Answer Correct Answer: D) Strike two blocks together and measure the time taken for the sound to travel a distance. 55. Assume that waves are propagating in a uniform medium. If the frequency of the wave source doubles then A) The wavelength of the waves halves. B) The speed of the waves halves. C) The wavelength of the waves doubles. D) The speed of the waves doubles. Show Answer Correct Answer: A) The wavelength of the waves halves. 56. As a wave's frequency increases its speed also increases A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 57. Which of the following sets of velocity and wavelength is correct about a sound wave that travels from a warmer lower level to a cooler higher level? A) Wavelength:Increases, Velocity:Decreases. B) Wavelength:Decreases, Velocity:Decreases. C) Wavelength:Increases, Velocity:Increases. D) Wavelength:Decreases, Velocity:Increases. Show Answer Correct Answer: B) Wavelength:Decreases, Velocity:Decreases. 58. What is visible light? A) The colors we see when we close our eyes. B) The light human eyes can see. C) When you turn on the light switch. D) None of the above. Show Answer Correct Answer: B) The light human eyes can see. 59. Sound waves have the best quality when traveling through a ..... A) Gas. B) Solid. C) Tornado. D) Liquid. Show Answer Correct Answer: A) Gas. 60. As the tension of a string or coil decreases, the wavelength of the string or coil will ..... A) Get longer. B) Remain the same. C) Get shorter. D) Harmonize. Show Answer Correct Answer: A) Get longer. ← PreviousNext →Related QuizzesScience QuizzesClass 11 QuizzesClass 11 Physics (Part Ii) Chapter 17 Waves Quiz 1Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 2Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 3Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 4Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 5Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 6Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 7Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books