This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 20 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 20 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of these is a type of longitudinal A) Ultrasound. B) Light. C) Infa-red. D) X-ray. Show Answer Correct Answer: A) Ultrasound. 2. What happens when a wave bounces back after hitting a barrier? A) Reflection. B) Refraction. C) Absorption. D) Diffraction. Show Answer Correct Answer: A) Reflection. 3. The number of wavelengths that pass a fixed point each second is known as ..... A) Hertz. B) Amplitude. C) Frequency. D) None of the above. Show Answer Correct Answer: C) Frequency. 4. Rainbows are ..... light. A) Reflecting. B) Diffracting. C) Refracting. D) Absorbing. Show Answer Correct Answer: C) Refracting. 5. The frequence f of a wave is: A) The number of waves in one second:. B) The distance between two successive crests. C) The lowest point of the wave. D) The highest point of the wave. Show Answer Correct Answer: A) The number of waves in one second:. 6. Ionizing radiation that can cause mutations is found in: A) Microwaves. B) X-rays. C) Radio waves. D) Visible light. Show Answer Correct Answer: B) X-rays. 7. What is the term for the change in direction of a wave at an interface between two different media, caused by its change in speed? A) Reflection. B) Absorption. C) Diffraction. D) Refraction. Show Answer Correct Answer: D) Refraction. 8. Which of the following best describes diffraction? A) The bending of waves around obstacles. B) The change in direction of waves when they pass from one medium to another. C) The spreading of waves when they pass through a small gap. D) The absorption of waves by a medium. Show Answer Correct Answer: C) The spreading of waves when they pass through a small gap. 9. Is all radiation dangerous? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 10. For lightwaves, the wavelength represents the A) Brightness. B) Colour. C) Angle. D) Speed. Show Answer Correct Answer: B) Colour. 11. What kind of wave does not require a medium to travel? A) Longitudinal. B) Mechanical. C) Electromagnetic. D) Seismic. Show Answer Correct Answer: C) Electromagnetic. 12. When an electron absorbs a photon of light, it also ..... A) Decreases energy level. B) Increases energy level. C) Gains negative charge. D) Gains positive charge. Show Answer Correct Answer: B) Increases energy level. 13. We measure the frequency of the wave using this unit: A) Km. B) Hertz (Hz). C) M/s. D) Metres (m). Show Answer Correct Answer: B) Hertz (Hz). 14. What happens when light passes through a convex lens? A) It spreads out. B) It changes color. C) It is focused to a point. D) It disappears. Show Answer Correct Answer: C) It is focused to a point. 15. A 1.5 m string is vibrating at its fundamental frequency of 440 Hz. What is the speed of the standing wave on the string? A) 293 m/s. B) 660 m/s. C) 147 m/s. D) 1320 m/s. Show Answer Correct Answer: D) 1320 m/s. 16. While playing with a slinky, two students make waves on opposite sides of the slinky. They notice that the waves seem to cancel out and disappear for an instant when the waves overlap. This is an example of ..... A) Constructive interference. B) Destructive diffraction. C) Constructive diffraction. D) Destructive Interference. Show Answer Correct Answer: D) Destructive Interference. 17. Describe the motion of particles at an antinode in a standing wave. A) Particles at an antinode in a standing wave have zero amplitude. B) Particles at an antinode in a standing wave remain stationary. C) Particles at an antinode in a standing wave experience minimal displacement. D) Particles at an antinode in a standing wave undergo maximum displacement and experience maximum amplitude. Show Answer Correct Answer: D) Particles at an antinode in a standing wave undergo maximum displacement and experience maximum amplitude. 18. The number of waves created per second is called A) The amplitude. B) The wavelength. C) The frequency. D) The period. Show Answer Correct Answer: C) The frequency. 19. The basic properties of waves are amplitude, frequency, and A) Mechanical. B) Temperature. C) Surface. D) Wavelength. Show Answer Correct Answer: D) Wavelength. 20. What is the significance of the electromagnetic spectrum? A) It is irrelevant to modern technology. B) It only applies to astronomy and space exploration. C) The electromagnetic spectrum is significant for understanding physical phenomena and enabling technologies across various fields. D) It describes only visible light phenomena. Show Answer Correct Answer: C) The electromagnetic spectrum is significant for understanding physical phenomena and enabling technologies across various fields. 21. A wave travels from a less dense medium to a more dense medium. The wavelength of the transmitted wave is ..... the wavelength of the incident wave. A) Impossible to tell. B) Less than. C) Greater than. D) Equal to. Show Answer Correct Answer: B) Less than. 22. Fill in the blank:The ..... of a wave is the number of complete waves passing a point per second. A) Frequency. B) Amplitude. C) Wavelength. D) Velocity. Show Answer Correct Answer: A) Frequency. 23. Which of the following is used to investigate the structure of solids? A) Cosmic Rays. B) X-Rays. C) Gamma Rays. D) Infrared Rays. Show Answer Correct Answer: B) X-Rays. 24. Both sound and light waves can travel through a vacuum. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 25. Which of the following waves have a maximum frequency? A) Radio waves. B) Microwaves. C) Gamma rays. D) Infrared waves. Show Answer Correct Answer: C) Gamma rays. 26. What do digital signals turn sounds into? A) Analog signals. B) Interference. C) Continuity. D) Zeros and ones. Show Answer Correct Answer: D) Zeros and ones. 27. What is NOT an example of the doppler effect? A) Siren moving towards you. B) Siren moving away from you. C) A train passes you in the train station. D) You are standing still and play a trumpet. Show Answer Correct Answer: D) You are standing still and play a trumpet. 28. Engineers are designing an auditorium that will be used for performances by orchestras. What must they do to maximize the loudness of the sound heard by the audience? A) Hang curtains behind the orchestra. B) Put carpet all around the walls of the auditorium. C) Hang reflecting panels from the ceiling behind the orchestra. D) Install narrow glass windows and skylights around the top of the walls. Show Answer Correct Answer: C) Hang reflecting panels from the ceiling behind the orchestra. 29. You shine a light on a mirror and the light waves bounce back. Which phenomenon is happening? A) Reflection. B) Diffraction. C) Refraction. D) Constructive interference. Show Answer Correct Answer: A) Reflection. 30. The higher the tension in a string, A) The less energy is transfered. B) The faster the wave moves. C) The slower the wave moves. D) The greater the wavelength. Show Answer Correct Answer: B) The faster the wave moves. 31. By what process is energy transferred when sound waves travel through air? A) Absorption of sound waves by surfaces. B) Vibrations of perpendicular electric and magnetic fields. C) Flow of air currents away from the sound source to the listener. D) Consecutive, repeating collisions or interactions of air particles. Show Answer Correct Answer: D) Consecutive, repeating collisions or interactions of air particles. 32. A wave has frequency of $5Hz$ $25ms^{-1}$ A) $125m$. B) $25m$. C) $5m$. D) $25m/s$. Show Answer Correct Answer: C) $5m$. 33. Which of the following statements best describes the relationship between wavelength and frequency? A) They are inversely proportional. B) Wavelength is dependent on frequency. C) They are directly proportional. D) They are unrelated. Show Answer Correct Answer: A) They are inversely proportional. 34. The normal is ..... A) A dotted line perpendicular to the boundary of a surface. B) A dotted line parallel to the boundary of a surface. C) All the above. D) None of the above. Show Answer Correct Answer: A) A dotted line perpendicular to the boundary of a surface. 35. What is the substance or material through which a waves moves? A) Period. B) Medium. C) Material. D) Wave substance. Show Answer Correct Answer: B) Medium. 36. What is redshift? A) Wavelengths that are being expunged because of the uppermost ionosphere, and therefore making the sky glow with red. B) Wavelengths being stretched so the spectrum of light is shifted towards red, and proof of the Big Bang. C) Wavelengths being compressed so the spectrum of light is shifted towards of red. D) Red being stretched so it makes waves. Show Answer Correct Answer: B) Wavelengths being stretched so the spectrum of light is shifted towards red, and proof of the Big Bang. 37. Mechanical waves usually travels fastest as the temperature of the medium: A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Increases. 38. Distance from the top of the wave to the middle A) Amplitude. B) Wavelength. C) Frequency. D) None of the above. Show Answer Correct Answer: A) Amplitude. 39. The highest part of a transverse wave is A) The crest. B) The wave point. C) The hotel transylvania. D) The trough. Show Answer Correct Answer: A) The crest. 40. Which is the correct order of the colours of light in the visible spectrum from longest to shortest wavelength A) Red, Orange, Yellow, Green, Blue, Indigo, Violet. B) Violet, Blue, Green Yellow, Orange, Pink, Red. C) Red, Yellow, Orange, Green, Blue, Indigo, Violet. D) Violet, Indigo, Blue, Green, Yellow, Orange, Red. Show Answer Correct Answer: A) Red, Orange, Yellow, Green, Blue, Indigo, Violet. 41. When blue and red light are shone in one place the resulting colour is A) Black. B) White. C) Pink. D) Magenta. Show Answer Correct Answer: D) Magenta. 42. Which type of wave is sound? A) Longitudinal wave. B) Electromagnetic wave. C) Transverse wave. D) Surface wave. Show Answer Correct Answer: A) Longitudinal wave. 43. Characteristics of Electromagnetic Wave ared A) Electromagnetic waves are transverse. B) Accelerated charges produce em waves. C) EM waves do not require a mediumtotravel. D) D. All of these. Show Answer Correct Answer: D) D. All of these. 44. Which region of the electromagnetic spectrum has the longest wavelength? A) Gamma rays. B) Radio waves. C) Ultraviolet. D) Infrared. Show Answer Correct Answer: B) Radio waves. 45. Explain the concept of damping in waves. A) Damping is the reduction in amplitude of a wave due to energy loss as it propagates through a medium. B) Damping is the amplification of a wave caused by external forces. C) Damping increases the frequency of a wave as it travels through a medium. D) Damping refers to the reflection of waves at a boundary between two media. Show Answer Correct Answer: A) Damping is the reduction in amplitude of a wave due to energy loss as it propagates through a medium. 46. A stretched string is observed to have four equal segments in a standing wave driven at a frequency of 480 Hz. What driving frequency will set up a standing wave with five equal segments? A) 600 Hz. B) 360 Hz. C) 240 Hz. D) None of the above. Show Answer Correct Answer: A) 600 Hz. 47. In magenta light a red T-shirt and Blue jeans would look ..... A) T-Shirt-blackJeans-blue. B) T-Shirt-redJeans-blue. C) T-Shirt-redJeans-black. D) T-shirt-blackJeans-black. Show Answer Correct Answer: B) T-Shirt-redJeans-blue. 48. A simple harmonic oscillator takes 4.8 s to undergo five complete vibrations. What is the period of the wave? A) 4.8 s. B) .96 s. C) 9.8 s. D) None of the above. Show Answer Correct Answer: B) .96 s. 49. A passing boat causes a floating object on a lake to bob up and down 18 times in 12s. The wavelength of the wave created by the boat is 48 cm.What is the velocity of these water waves? A) 32cm/s. B) 72cm/s. C) 576cm/s. D) 864cm/s. Show Answer Correct Answer: B) 72cm/s. 50. A mechanical wave in which the disturbance is in the same direction, or parallel to, the direction of wave motion A) Transverse wave. B) Surface wave. C) Vertical wave. D) Longitudinal wave. Show Answer Correct Answer: D) Longitudinal wave. 51. A straw appears bent in a glass of water, entering a new medium. Which phenomenon is happening? A) Refraction. B) Constructive interference. C) Reflection. D) Diffraction. Show Answer Correct Answer: A) Refraction. 52. Which type of waves are used by bats for echolocation? A) Microwaves. B) Infrasound. C) Radio waves. D) Ultrasound. Show Answer Correct Answer: D) Ultrasound. 53. Which terms best describe light waves traveling from the Sun to Earth? A) Mechanical. B) Longitudinal. C) Invisible. D) Electromagnetic. Show Answer Correct Answer: D) Electromagnetic. 54. An example of a longitudinal wave is a ..... A) Stadium wave. B) Rope wave. C) Water wave. D) Sound wave. Show Answer Correct Answer: D) Sound wave. 55. What is the distance from wave peak to wave peak called? A) Longitudinal wave. B) Volume. C) Amplitude. D) Wavelength. Show Answer Correct Answer: D) Wavelength. 56. An intruder alarm sensor detects that a person is warmer than his surrounding. Which type of electromagnetic wave does the sensor detects? A) Ultraviolet. B) Radio. C) Visible light. D) Infared. Show Answer Correct Answer: D) Infared. 57. A sound wave travels from air into water. Which row describes what happens to the frequency and the wavelength of the wave? A) Frequency:stays the same; Wavelength:increases. B) Frequency:decreases; Wavelength:increases. C) Frequency:decreases; Wavelength:stays the same. D) Frequency:stays the same; Wavelength:decreases. Show Answer Correct Answer: A) Frequency:stays the same; Wavelength:increases. 58. What happens to the frequency of a wave as wavelength increases? A) Remains constant. B) Decreases. C) Diminishes to zero. D) Increases. Show Answer Correct Answer: B) Decreases. 59. True or False:Amplitude can increase or decrease wavelength A) True, amplitude can increase or decrease wavelength. B) False, frequency can increase or decrease wavelength. C) False, crests can increase or decrease wavelength. D) None of the above. Show Answer Correct Answer: B) False, frequency can increase or decrease wavelength. 60. Waves that travel through a medium are ..... waves. A) Transverse. B) Electromagnetic. C) Mechanical. D) Compressional. Show Answer Correct Answer: C) Mechanical. ← 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