This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Equation of wave propagating in the positive x direction A) Y(x, t)=a sin (kx-$\omega$ $\phi$. B) Y(x, t)=a sin (kx+ $\omega$ $\phi$. C) Y(x, t)=a cos (kx+ $\omega$ $\phi$. D) Y(x, t)=a cos (kx-$\omega$ $\phi$. Show Answer Correct Answer: A) Y(x, t)=a sin (kx-$\omega$ $\phi$. 2. Wave motion:A bulldozer A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 3. The horn on a ship makes a sound. The captain on the ship hears an echo from a cliff 4.0 s later.The speed of sound is 340 m/s. How far away is the cliff from the ship? A) 340 m. B) 56 m. C) 1360 m. D) 680 m. E) 170 m. Show Answer Correct Answer: D) 680 m. 4. In a transverse wave, particles of the medium move ..... to the direction the wave is traveling. A) Back and forth (left and right). B) Perpendicular (at 90 degrees). C) Parallel. D) Wherever the wave is going. Show Answer Correct Answer: B) Perpendicular (at 90 degrees). 5. An amusement park ride has a frequency of 0.064 Hz. What is the ride's period? A) 0.064 sec. B) 2pi / 0.064. C) 6.4 sec. D) 15.625 sec. Show Answer Correct Answer: D) 15.625 sec. 6. A monochromatic laser shines at $422nm$ A) $0.813Hz$. B) $1.45\times10^{-4}Hz$. C) $7.11\times10^{14}Hz$. D) $711000Hz$. Show Answer Correct Answer: C) $7.11\times10^{14}Hz$. 7. Which direction does a Longitudinal wave travel A) Parallel. B) Perpendicular. C) All the above. D) None of the above. Show Answer Correct Answer: A) Parallel. 8. Distance from one part of the wave to the exact same point on the next wave. A) Amplitude. B) Crest. C) Wavelength. D) Trough. Show Answer Correct Answer: C) Wavelength. 9. What is the purpose of the focal point in a lens? A) To scatter light. B) To magnify objects. C) To absorb light. D) To focus light rays to a single point. Show Answer Correct Answer: D) To focus light rays to a single point. 10. For a sound wave to produce an echo, it must A) Have a high pitch. B) Diffract. C) Have long wavelengths. D) Reflect off surfaces. Show Answer Correct Answer: D) Reflect off surfaces. 11. The type of wave that can travel through either matter or empty space: A) Mechanical Waves. B) Electromagnetic Waves. C) All the above. D) None of the above. Show Answer Correct Answer: B) Electromagnetic Waves. 12. Select the use for Visible Light A) Communications through optical fibres. B) Satellite communications. C) Electric Heaters. D) Medical Treatments/imaging. Show Answer Correct Answer: A) Communications through optical fibres. 13. Which of the following is NOT a property of waves? A) Amplitude. B) Wavelength. C) Time. D) Frequency. Show Answer Correct Answer: C) Time. 14. How long does it take for light from the sun to reach earth if the sun is 1.5 x 10$^{11}$ m away? A) 8 minutes, 20 seconds. B) 0.1 seconds. C) 5 minutes. D) 4 seconds. Show Answer Correct Answer: A) 8 minutes, 20 seconds. 15. Which type of wave has a disturbance parallel to its direction of propagation? A) Transverse wave. B) Longitudinal wave. C) Pulse wave. D) Periodic wave. Show Answer Correct Answer: B) Longitudinal wave. 16. Which type of electromagnetic wave is most commonly demonstrated to show polarisation in school experiments? A) X-rays. B) Radio waves. C) Microwaves. D) Light waves. Show Answer Correct Answer: D) Light waves. 17. What safety precaution should be taken when working with the ray box? A) Avoid touching any metal surfaces during and just after use. B) Handle the ray box with wet hands. C) Leave the ray box on when not in use. D) Look directly at the ray box light. Show Answer Correct Answer: A) Avoid touching any metal surfaces during and just after use. 18. What do we call a material through which waves can travel? It can be a solid, liquid, or gas. A) Vibrations. B) Medium. C) Vacuum. D) Amplitude. Show Answer Correct Answer: B) Medium. 19. What is the measurement unit for frequency: A) Watts. B) Hertz. C) M/s. D) Metres. Show Answer Correct Answer: B) Hertz. 20. What is it called when light waves enter a substance? A) Reflection. B) Refraction. C) Absorption. D) Energy. Show Answer Correct Answer: C) Absorption. 21. When a wave strikes and object and bounces off. (example echo) A) Refraction. B) Medium. C) Reflection. D) Interference. Show Answer Correct Answer: C) Reflection. 22. If the frequency gets higher, the wavelength gets A) Longer. B) Shorter. C) All the above. D) None of the above. Show Answer Correct Answer: B) Shorter. 23. What is the distance between one part of a wave and the nearest point just like it on the next wave? A) Period. B) Rarefaction. C) Wavelength. D) Frequency. Show Answer Correct Answer: C) Wavelength. 24. An observer counts 4 complete water waves passing by the end of a dock every 10. seconds. What is the frequency of the waves? A) 4.0 Hz. B) 0.40 Hz. C) 40. Hz. D) 2.5 Hz. Show Answer Correct Answer: B) 0.40 Hz. 25. The motion of a metronome is an example of simple ..... motion. A) Harmonic. B) Geometric. C) Lyric. D) Waveform. Show Answer Correct Answer: A) Harmonic. 26. The distance from any point on a wave to an identical point on the next wave A) Frequency. B) Wave speed. C) Amplitude. D) Wavelength. Show Answer Correct Answer: D) Wavelength. 27. Explain how standing waves can be created in a string instrument. A) Standing waves are created by plucking the string once. B) Standing waves are created in a string instrument when the string vibrates at specific frequencies, leading to interference between incoming and reflected waves. C) Standing waves are formed when the string is heated to a high temperature. D) Standing waves occur only when the string is not fixed at both ends. Show Answer Correct Answer: B) Standing waves are created in a string instrument when the string vibrates at specific frequencies, leading to interference between incoming and reflected waves. 28. What type of matter can waves travel through? A) Solid. B) Liquid. C) Gas. D) All of the Above. Show Answer Correct Answer: D) All of the Above. 29. What is a wave in physics? A) A wave in physics is a stationary object. B) A wave in physics is a type of particle. C) A wave in physics is a form of solid matter. D) A wave in physics is a disturbance that transfers energy through matter or space without transferring mass. Show Answer Correct Answer: D) A wave in physics is a disturbance that transfers energy through matter or space without transferring mass. 30. A bird looks at a mirror and sees a bug. The bird is looking at the mirror with an angle of incidence of 15.3$^\circ$. The bird smashes the mirror thinking the bug is right there. At what angle was the bug to the mirror's normal? A) 74.7$^\circ$. B) 90.0$^\circ$. C) 15.3$^\circ$. D) 164.7$^\circ$. Show Answer Correct Answer: C) 15.3$^\circ$. 31. Which type of EM waves has the shortest wavelength? A) Visible light. B) Radio wave. C) Ultraviolet. D) Gamma ray. Show Answer Correct Answer: D) Gamma ray. 32. Which symbol is used for wavelength? A) P. B) WS. C) $\lambda$. D) F. Show Answer Correct Answer: C) $\lambda$. 33. Which has a shorter wavelength, Red or Blue? A) Red. B) Blue. C) All the above. D) None of the above. Show Answer Correct Answer: B) Blue. 34. When sound is created, it travels to the ear through a A) Surface. B) Medium. C) Rarefaction. D) Compression. Show Answer Correct Answer: B) Medium. 35. Cell phone signals are transmitted by ..... A) X-Rays. B) Infrared Rays. C) Radio Waves. D) Ultraviolet Rays. Show Answer Correct Answer: C) Radio Waves. 36. In an experiment, a wave travels through a medium and its speed is measured. If the frequency of the wave is doubled, what happens to the wavelength, assuming the speed remains constant? A) The wavelength is halved. B) The wavelength remains the same. C) The wavelength doubles. D) The wavelength becomes zero. Show Answer Correct Answer: A) The wavelength is halved. 37. Low frequency = ..... pitch A) MEDIUM. B) STRAIGHT. C) HIGH. D) LOW. Show Answer Correct Answer: D) LOW. 38. A vibrating object makes 25 complete back and forth vibrations in 5 seconds. The frequency of vibration of the object is ..... Hertz. A) 20.0. B) 0.25. C) 4.0. D) 5.0. Show Answer Correct Answer: D) 5.0. 39. As the wavelength of a wave increases, its frequency ..... A) Increases. B) Decreases. C) Is unaffected. D) None of the above. Show Answer Correct Answer: B) Decreases. 40. When a plane moves faster than the speed of sound and breaks the sound barrier: A) A infrared light will be produced. B) The plane will slow down. C) A sonic boom is produced. D) The Doppler effect is observed. Show Answer Correct Answer: C) A sonic boom is produced. 41. When a wave enters a new medium and one side of the wave changes speed before the other it causes the wave to ..... A) Break. B) Ignite. C) Fold. D) Bend. Show Answer Correct Answer: D) Bend. 42. What is another word for compressional waves? A) Longitudinal. B) Rarefaction. C) Electromagnetic. D) Transverse. Show Answer Correct Answer: A) Longitudinal. 43. The speed of a wave depends upon the ..... A) Properties of the medium. B) Wavelength of the wave. C) Frequency of the wave. D) Period of the wave. Show Answer Correct Answer: A) Properties of the medium. 44. What is wave reflection? A) The process of a wave bouncing off a surface when it encounters a boundary. B) The process of a wave being absorbed by a surface. C) The process of a wave changing direction when it encounters a boundary. D) The process of a wave passing through a surface without any change. Show Answer Correct Answer: A) The process of a wave bouncing off a surface when it encounters a boundary. 45. What type of wave must have a medium to vibrate? A) Electromagnetic. B) Infrared. C) Mechanical. D) Radio. Show Answer Correct Answer: C) Mechanical. 46. What is the frequency of a wave traveling at 300 m/s with a 4 m wavelength? A) 1200 Hz. B) 75 Hz. C) 0.013 Hz. D) 300 Hz. Show Answer Correct Answer: B) 75 Hz. 47. A mechanical wave travels from point A to point B. Which is true about this process? A) The wave transferred energy from A to B. B) The wave transferred matter from A to B. C) The wave transferred energy and matter from A to B. D) The wave did not move matter or energy from A to B. (It only moved them in place.). Show Answer Correct Answer: A) The wave transferred energy from A to B. 48. What makes electromagnetic waves different from mechanical waves? A) Light-catalyzed. B) Space exclusive. C) No medium required. D) Medium needed. Show Answer Correct Answer: C) No medium required. 49. Increasing speed, decreasing speed, and changing direction are all types of A) Speed. B) Acceleration. C) Velocity. D) Slope. Show Answer Correct Answer: B) Acceleration. 50. In davisson-Germer experiment, the filamentemits:- A) X-rays. B) Electrons. C) Photons. D) Protons. Show Answer Correct Answer: B) Electrons. 51. Two sound waves of frequencies 300 Hz and 600 Hz travels in air then the ratio between their speed is ..... A) 2:1. B) 1:1. C) 1:2. D) No correct answer. Show Answer Correct Answer: B) 1:1. 52. When a wave's amplitude increases it means A) It's carrying more energy. B) Its wavelength gets longer. C) Its wavelength decreases. D) Its frequency increases. Show Answer Correct Answer: A) It's carrying more energy. 53. The frequency of a wave is measured in (a) . A) Trough. B) Compression. C) A. Hertz. D) Rarefaction. E) Crest. Show Answer Correct Answer: C) A. Hertz. 54. In a wave experiment, if the time taken for 10 waves to pass a point is 5 seconds, what is the frequency of the wave? A) 2 Hz. B) 0.5 Hz. C) 10 Hz. D) 5 Hz. Show Answer Correct Answer: A) 2 Hz. 55. What do we call the top of the wave? A) Amplitude. B) Crest. C) Trough. D) Frequency. Show Answer Correct Answer: B) Crest. 56. Which of the following could NOT be demonstrated with a single wave pulse. A) Standing Wave. B) Diffraction. C) Reflection. D) Propagation. Show Answer Correct Answer: A) Standing Wave. 57. What unit is used to measure the loudness of sounds? A) Watts. B) Decibels. C) Hertz. D) Joules. Show Answer Correct Answer: B) Decibels. 58. What is the relationship between the frequency (f) and the period (T) of a wave? A) $f = \frac{1}{T}$. B) $f = 2T$. C) $f = T$. D) $f = \frac{T}{2}$. Show Answer Correct Answer: A) $f = \frac{1}{T}$. 59. What is the speed of a wave with a frequency of 20Hz and a wavelength of 0.4m? A) 100m/s. B) 25m/s. C) 8m/s. D) None of the above. Show Answer Correct Answer: C) 8m/s. 60. A sailor measures 5 waves passing her boat in 10 seconds. Each wave has a wavelength of 2 m. What is the speed of the wave? A) 4 m/s. B) 1 m/s. C) 0.5 m/s. D) 10 m/s. Show Answer Correct Answer: B) 1 m/s. ← 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 6Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 7Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 8Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books