This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. If the frequency of an oscillation is 8 Hz, its period is: A) 8 s. B) 0.125 Hz. C) 0.125 s. D) 8 Hz. Show Answer Correct Answer: C) 0.125 s. 2. True or False:Frequency is how many waves pass per second. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 3. The difference between one note and other in music is equivalent to: A) The wavelength. B) The frequency. C) The amplitude. D) The nodes. Show Answer Correct Answer: B) The frequency. 4. What is the amplitude of a wave? A) A disturbance that transfers energy from one place to another. B) Where there is no wave movement. C) The distance the wave oscillates from it's resting position. D) The distance between two corresponding parts of a wave. Show Answer Correct Answer: C) The distance the wave oscillates from it's resting position. 5. What is "amplitude" in the context of wave properties? A) The frequency of a wave. B) The bending of a wave around a barrier. C) The speed of a wave. D) The measure of the size or magnitude of a wave. Show Answer Correct Answer: D) The measure of the size or magnitude of a wave. 6. The width of central maximum is directly proportional to the wavelength of light. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 7. What is transferred by the movement of waves? A) Matter. B) Water. C) Nothing. D) Energy. Show Answer Correct Answer: D) Energy. 8. Define refraction in the context of waves. A) Refraction is the bending of waves as they pass from one medium to another, resulting in a change in speed and direction. B) Refraction is the scattering of waves in all directions as they travel through a medium. C) Refraction is the absorption of waves by a medium, leading to energy loss without direction change. D) Refraction is the reflection of waves when they hit a barrier, causing no speed change. Show Answer Correct Answer: A) Refraction is the bending of waves as they pass from one medium to another, resulting in a change in speed and direction. 9. A construction company designs a new office tower with an outer surface mostly made of glass (nglass = 1.52). The company wishes that the glass appear a reddish-orange without having to use coloured glass. Instead, a thin film (nfilm = 1.65) is used that maximizes the reflection of that colour of light (wavelength 615 nm). What thickness would this film need to be? A) 1.2 mm. B) 1.5 x 10-8 m. C) 2.67 x 10-8 m. D) 9.32 x 10-8 m. E) 8.67 x 10-8 m. Show Answer Correct Answer: D) 9.32 x 10-8 m. 10. Which of the following best describes the phenomenon of wave interference? A) Waves changing speed in different media. B) Waves bending around an obstacle. C) Waves combining to form a new wave pattern. D) Waves bouncing off a surface. Show Answer Correct Answer: C) Waves combining to form a new wave pattern. 11. What are the two main types of waves? A) Mechanical waves and electromagnetic waves. B) Transverse waves and longitudinal waves. C) Radio waves and seismic waves. D) Sound waves and light waves. Show Answer Correct Answer: A) Mechanical waves and electromagnetic waves. 12. Sound will travel slowest through which of the following forms of matter (media)? A) Milk. B) Air. C) A door. D) A desk. Show Answer Correct Answer: B) Air. 13. If the time interval between the first crest and the twenty trough in a wave motion is 0.74 sec then the frequency is ..... Hz A) 0.25. B) 25. C) 50. D) 55. Show Answer Correct Answer: B) 25. 14. Infrared radiation is commonly used in: A) Airport body scanners. B) MRI machines. C) FM radio broadcasting. D) Remote controls. Show Answer Correct Answer: D) Remote controls. 15. What happens when a wave pulse is reflected from a fixed end? A) The wave continues unchanged. B) The wave stops. C) The wave inverts. D) The wave doubles in amplitude. Show Answer Correct Answer: C) The wave inverts. 16. True or false:as you move along the spectrum, radio to gamma waves, the wavelengths decrease in size (get smaller) A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. A wave in which the particles of the medium move perpendicularly to the direction the wave is traveling A) Surface wave. B) Electromagnetic wave. C) Transverse wave. D) Longitudinal wave. Show Answer Correct Answer: C) Transverse wave. 18. Which part of the longitudinal waves has the highest amplitude? A) Tightly coiled spring. B) Loosely coiled spring. C) Rarefaction. D) None of the above. Show Answer Correct Answer: A) Tightly coiled spring. 19. Displacement current is always A) Equal to conduction current. B) Less than conduction current. C) Greater than conduction current. D) The sum of current due to flow of positive and negative ions. Show Answer Correct Answer: A) Equal to conduction current. 20. What should be observed in a beaker to study refraction? A) Absorption. B) Refraction. C) Reflection. D) Diffraction. Show Answer Correct Answer: B) Refraction. 21. An ambulance drives towards you. You hear the siren ..... A) Who cares, get out of the way of the amulance!. B) At a lower pitch than usual. C) At the same pitch as usual. D) At a higher pitch than usual. Show Answer Correct Answer: D) At a higher pitch than usual. 22. The SI unit of frequency is hertz. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. The height of the wave (distance from rest to crest) A) Trough. B) Crest. C) Wavelength. D) Amplitude. Show Answer Correct Answer: D) Amplitude. 24. Light waves are ..... waves. A) Electromagnetic. B) Compressional. C) Transverse. D) Longitudinal. Show Answer Correct Answer: A) Electromagnetic. 25. What is the result of a wave contacting a hard surface? A) The wave changes its frequency. B) The wave reflects. C) The wave is absorbed. D) The wave continues without any change. Show Answer Correct Answer: B) The wave reflects. 26. What frequency range represent the human hearing capacity A) Below 20 Hz. B) Between 20 Hz and 20 000 Hz. C) Between 20 000Hz and 40 000 Hz. D) Above 20 000 Hz. Show Answer Correct Answer: B) Between 20 Hz and 20 000 Hz. 27. Waves that can travel through empty space are called ..... waves. Waves that require a medium to travel, such as air or water, are called ..... waves. A) Mechanical, electromagnetic. B) Compressional, rarefactional. C) Electromagnetic, mechanical. D) Crest, trough. Show Answer Correct Answer: C) Electromagnetic, mechanical. 28. In music, the frequency of the sound waves determine its ..... A) Loudness. B) Medium. C) Clarity. D) Pitch. Show Answer Correct Answer: D) Pitch. 29. How does the hazard level of electromagnetic waves change as the frequency of the waves increases? A) Energy and wavelength increase; it becomes more hazardous. B) Energy and wavelength decrease; becomes less hazardous. C) Energy decreases, wavelength increases; it becomes less hazardous. D) Energy increases, wavelength decreases; it becomes more hazardous. Show Answer Correct Answer: D) Energy increases, wavelength decreases; it becomes more hazardous. 30. This word is associated with the height of a wave. A) Wavelength. B) Wave Speed. C) Frequency. D) Amplitude. Show Answer Correct Answer: D) Amplitude. 31. A disturbance in a medium which moves energy from one place to another is called a A) Pulse. B) Wave. C) Node. D) Antinode. Show Answer Correct Answer: B) Wave. 32. Bottom of the wave A) Frequency. B) Crest. C) Trough. D) Wavelength. Show Answer Correct Answer: C) Trough. 33. What are standing waves? A) Waves that appear to remain in one place and do not seem to move. B) Waves that seem to move along a trajectory. C) All the above. D) None of the above. Show Answer Correct Answer: A) Waves that appear to remain in one place and do not seem to move. 34. A disturbance that travels through the medium from one location to another location A) Mechanical wave. B) Speed wave. C) Electromagnetic wave. D) Light wave. Show Answer Correct Answer: A) Mechanical wave. 35. What is the significance of the first harmonic in standing waves? A) The first harmonic is always the loudest in standing waves. B) The first harmonic is irrelevant in standing waves. C) The first harmonic represents the fundamental frequency of the system. D) The first harmonic is only present in odd-numbered systems. Show Answer Correct Answer: C) The first harmonic represents the fundamental frequency of the system. 36. Electromagnetic waves are different from mechanical waves because: A) Electromagnetic waves only travel through a medium. B) Electromagnetic waves travel slower than mechanical waves. C) Eectromagnetic waves are not emitted from the Sun. D) Electromagnetic waves does not requieres a medium to travel. Show Answer Correct Answer: D) Electromagnetic waves does not requieres a medium to travel. 37. After loosening a guitar string, how does the final frequency (f) of the string compare to its initial frequency? A) Remains unchanged. B) Same as Initial. C) Greater than Initial. D) Less than Initial. Show Answer Correct Answer: D) Less than Initial. 38. What is an example of a transverse wave? A) Light Waves. B) Water waves. C) X-Ray. D) Slinky. Show Answer Correct Answer: B) Water waves. 39. If 10 waves pass a point every $16s$ A) $0.312Hz$. B) $10Hz$. C) $1.6Hz$. D) $0.625Hz$. Show Answer Correct Answer: D) $0.625Hz$. 40. How has resonance been responsible for collapsing bridges? A) Resonace has led to earthquakes that tear down bridges. B) Resonance in bridges causes them to begin to vibrate and eventually collapse. C) Resonance cannot tear down a bridge. D) Resonance causes the bridge to wear away over many years, and eventially fall. Show Answer Correct Answer: B) Resonance in bridges causes them to begin to vibrate and eventually collapse. 41. Which of the following proves that electromagnetic waves are transverse? A) Reflection. B) Polarisation. C) Interference. D) Diffraction. Show Answer Correct Answer: B) Polarisation. 42. Distance between two adjacent crests or compressions in a series of waves A) Wavelength. B) Velocity. C) Amplitude. D) Wave speed. Show Answer Correct Answer: A) Wavelength. 43. Which types of EM wave can cause (DNA mutations and ) cancer in humans? (a) A) A. Ultraviolet, X-rays and Gamma rays. B) Microwave, X-rays, Gamma rays. C) Visible Light, Ultraviolet and Gamm. D) Don't know/Can't remember. Show Answer Correct Answer: A) A. Ultraviolet, X-rays and Gamma rays. 44. What type of mechanical wave motion causes particles to move both parallel and perpendicular to the wave direction, resulting in a circular motion? A) Scattering. B) S waves. C) P waves. D) Surface waves. Show Answer Correct Answer: D) Surface waves. 45. There are two types of mechanical waves: A) EM and Compressional. B) Compressional and Longitudinal. C) Transverse and Longitudinal. D) Transverse and Electromagnetic. Show Answer Correct Answer: C) Transverse and Longitudinal. 46. What is the angle of incidence in relation to the angle of reflection? A) The angle of incidence is always greater than the angle of reflection. B) The angle of incidence is perpendicular to the angle of reflection. C) The angle of incidence is half of the angle of reflection. D) The angle of incidence is equal to the angle of reflection. Show Answer Correct Answer: D) The angle of incidence is equal to the angle of reflection. 47. What is the frequency of a wave with time period of 0.08s? A) 12.5Hz. B) 1.25Hz. C) 8Hz. D) 0.08Hz. Show Answer Correct Answer: A) 12.5Hz. 48. How would you describe the movement of a transverse wave? A) Up and down. B) Back and forth. C) In zigzags. D) Linear. Show Answer Correct Answer: A) Up and down. 49. The SI unit for frequency is ..... A) M. B) M/s. C) S. D) Hertz. Show Answer Correct Answer: D) Hertz. 50. The rate at which the wave travels or moves through a medium (related to frequency and wavelength) A) Amplitude. B) Wavelength. C) Wave Speed. D) Frequency. Show Answer Correct Answer: C) Wave Speed. 51. Which part of the electromagnetic spectrum has the largest wavelengths? A) Infrared light. B) Radiowaves. C) Microwaves. D) Ultraviolet light. Show Answer Correct Answer: B) Radiowaves. 52. For a given angle of incidence, the greatest change in direction of a light ray is produced when the light ray passes obliquely from air into A) Lucite. B) Fused Quartz. C) Glycerol. D) Crown Glass. Show Answer Correct Answer: D) Crown Glass. 53. What is the relationship between sound intensity and loudness? A) Exponential. B) Linear. C) Quadratic. D) Logarithmic. Show Answer Correct Answer: D) Logarithmic. 54. What is the fundamental frequency of a standing wave? A) Dependent on the amplitude of the wave. B) Influenced by the color of the medium. C) Determined by the length of the medium and the speed of the wave. D) Varies based on the temperature of the medium. Show Answer Correct Answer: C) Determined by the length of the medium and the speed of the wave. 55. The types of seismic waves are P waves, S waves, and A) Surface waves. B) Tsunami waves. C) Standing waves. D) Longitudinal waves. Show Answer Correct Answer: A) Surface waves. 56. An ambulance drives towards you with it's siren on. You expect to hear the sound ..... A) At a higher pitch than usual. B) At a lower pitch than usual. C) All the above. D) None of the above. Show Answer Correct Answer: A) At a higher pitch than usual. 57. Definition:Crest A) The lowest point of a transverse wave. B) The center of a transverse wave. C) The distance between two points on a wave. D) The highest point of a transverse wave. Show Answer Correct Answer: D) The highest point of a transverse wave. 58. If light passes from air to glass and the refractive index of the glass is 2.0, what happens to the speed of the light in the glass? A) It quaduples. B) It triples. C) It halves. D) It doubles. Show Answer Correct Answer: C) It halves. 59. States that the angle of incidence is equal to the angle of reflection A) Hooke's law. B) Node. C) Law of reflection. D) Doppler effect. Show Answer Correct Answer: C) Law of reflection. 60. What type of solar radiation is absorbed by the ozone layer, helping to prevent harmful radiation from reaching Earth's surface? A) Gamma rays. B) Infrared. C) Ultraviolet. D) X-rays. Show Answer Correct Answer: C) Ultraviolet. 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