This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 23 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 23 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The maximum distance that the particles of a wave's medium vibrate from their rest position A) Frequency. B) Wavelength. C) Wavespeed. D) Amplitude. Show Answer Correct Answer: D) Amplitude. 2. What type of EM radiation plays an important role in wireless communication? A) Ultraviolet. B) Microwave. C) Infrared. D) Visible light. Show Answer Correct Answer: B) Microwave. 3. When a wave encounters a boundary between two media, the change in direction of the wave is known as ..... A) Reflection. B) Refraction. C) Polarisation. D) None of the above. Show Answer Correct Answer: B) Refraction. 4. In what type of wave does the medium move perpendicular to the movement of the wave? A) Radio. B) Transverse. C) Longitudinal. D) Electromagnetic. Show Answer Correct Answer: B) Transverse. 5. When amplitude is increased how will it effect a light wave? A) Increases volume. B) Increased brightness. C) Decreases brightness. D) Increase fequency. Show Answer Correct Answer: B) Increased brightness. 6. What type of energy does a sound wave have? A) Mechanical. B) Radiant. C) Electrical. D) Sound. Show Answer Correct Answer: A) Mechanical. 7. What is the intensity of a wave related to? A) The wavelength of the wave. B) The speed of the wave. C) The frequency of the wave. D) The amplitude of the wave. Show Answer Correct Answer: D) The amplitude of the wave. 8. The ..... is the size or height of a wave, measured from the equilibrium to the crest or trough. A) Amplitude. B) Wavelength. C) Frequency. D) None of the above. Show Answer Correct Answer: A) Amplitude. 9. True or False:The angle of incidence always equals the angle of reflection A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. Describe the phenomenon of wave interference. A) Wave interference occurs only in sound waves. B) Wave interference is the phenomenon where two or more waves superpose to form a resultant wave, leading to patterns of constructive and destructive interference. C) Wave interference is the result of waves colliding and disappearing. D) Wave interference is a phenomenon that only happens in liquids. Show Answer Correct Answer: B) Wave interference is the phenomenon where two or more waves superpose to form a resultant wave, leading to patterns of constructive and destructive interference. 11. Sound with a high pitch has a high ..... A) Wavelength. B) Wave velocity. C) Frequency. D) Amplitude. Show Answer Correct Answer: C) Frequency. 12. A guitar string vibrates with a frequency of 320 hz. If the wavelength of the vibration is 0.23 meters what is the speed of the wave? A) 1391.3 hz. B) 320.23 m/s. C) 73.6 m/s. D) 73.6 m/hz. Show Answer Correct Answer: C) 73.6 m/s. 13. If the wavelength of a wave increased, what would happen to the frequency? A) Decrease. B) Increase. C) Stay the same. D) None of the above. Show Answer Correct Answer: A) Decrease. 14. Which type of wave can travel through a vacuum? A) Water waves. B) Seismic waves. C) Electromagnetic waves. D) Sound waves. Show Answer Correct Answer: C) Electromagnetic waves. 15. When a wave bends around a barrier or passes through an opening, it is called A) Interference. B) Refraction. C) Reflection. D) Diffraction. Show Answer Correct Answer: D) Diffraction. 16. Speed = Wavelength (a) Frequency A) A. x. B) -. C) +. D) /. Show Answer Correct Answer: A) A. x. 17. Explain how the speed of a wave changes when it enters a different medium. A) Speed of the wave can either increase or decrease. B) Speed of the wave becomes zero. C) Speed of the wave becomes negative. D) Speed of the wave remains constant. Show Answer Correct Answer: A) Speed of the wave can either increase or decrease. 18. At the equilibrium position, the oscillator experiences no acceleration. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. The number of waves that go by in a certain amount of time is known as A) Wavelength. B) Latitude. C) Speed. D) Frequency. Show Answer Correct Answer: D) Frequency. 20. Which of the following factors affects the speed of sound? A) Temperature. B) Weight. C) Shape. D) Color. Show Answer Correct Answer: A) Temperature. 21. Which term describes the highest point on a wave? A) Trough. B) Frequency. C) Crest. D) Wavelength. Show Answer Correct Answer: C) Crest. 22. Destructive interference happens when two waves A) Change their speed and bend. B) Meet and make a wave with a smaller amplitude. C) Meet and make a wave with a bigger amplitude. D) Go around a barrier. Show Answer Correct Answer: B) Meet and make a wave with a smaller amplitude. 23. Unit for wave frequency? A) Kg. B) Metre. C) Mm. D) Hertz. Show Answer Correct Answer: D) Hertz. 24. The spreading of waves as they pass through an opening or around an obstacle is called A) Refraction. B) Reflection. C) Diffraction. D) Interference. Show Answer Correct Answer: C) Diffraction. 25. What causes waves? A) Vibrations. B) Reflections. C) Mediums. D) Whales. Show Answer Correct Answer: A) Vibrations. 26. Explain how a plane mirror reflects light. A) A plane mirror absorbs all light without reflection. B) A plane mirror reflects light by bending it at a 90-degree angle. C) A plane mirror reflects light by following the law of reflection, where the angle of incidence equals the angle of reflection. D) A plane mirror reflects light only when it is illuminated from behind. Show Answer Correct Answer: C) A plane mirror reflects light by following the law of reflection, where the angle of incidence equals the angle of reflection. 27. Waves changing direction at a boundary is called ..... A) Absorption. B) Refraction. C) Transmission. D) Reflection. Show Answer Correct Answer: B) Refraction. 28. Electrons used in an electron microscope areaccelerated by a voltage of 25 kV. If the voltageis increased to 100 kV then the de-Brogliewavelength associated with the electrons would: A) Increase by 2 times. B) Increase by 4 times. C) Decrease by 2 times. D) Decrease by 4 times. Show Answer Correct Answer: C) Decrease by 2 times. 29. A wave that needs a medium to travel is called a(n) A) Ocean wave. B) Mechanical wave. C) Any way can do this. D) Electromagnetic wave. Show Answer Correct Answer: B) Mechanical wave. 30. If a string is attached to a fixed point, the pulse will be reflected back at the same amplitude ..... A) AND DIRECTION. B) BUT INVERTED. C) BUT DIFFERENT FREQUENCY. D) BUT DIFFERENT ENERGY LEVEL. Show Answer Correct Answer: B) BUT INVERTED. 31. Which of the following can sound travel through? A) Solid. B) Liquid. C) Gas. D) All of the above. Show Answer Correct Answer: D) All of the above. 32. What is the main use of concave lenses? A) To spread light rays apart. B) To magnify objects. C) To bend light. D) To focus light to a point. Show Answer Correct Answer: A) To spread light rays apart. 33. Amplitude is a measurement of the A) Amount of energy the wave has. B) Distance of wavelength. C) Pitch. D) Speed of the wave. Show Answer Correct Answer: A) Amount of energy the wave has. 34. Does a 5.2 x 10$^{5}$ Hz or 1.5 x 10$^{6}$ Hz AM radio wave have a longer wavelength? A) 5.2 x 10$^{5}$. B) 1.5 x 10$^{6}$. C) They're both the same. D) None of the above. Show Answer Correct Answer: A) 5.2 x 10$^{5}$. 35. The frequency of a wave is doubled when the wavelength remains the same. What happens to the speed of the wave? A) It doubles. B) Remains unchanged. C) It is cut to one-half. D) It is cut to one-fourth. E) It quadruples. Show Answer Correct Answer: A) It doubles. 36. How high or low a sound is; depends on the frequency (greater frequency= higher pitch) A) Sound. B) Frequency. C) Medium. D) Pitch. Show Answer Correct Answer: D) Pitch. 37. If an object moves toward you on a warm day with a sound frequency of 500 Hz at a speed of 10 meters per second, what frequency do you detect?The speed of sound in this particular situation is 343 m/s. You are stationary. A) 510 Hz. B) 515 Hz. C) 615 Hz. D) 610 Hz. Show Answer Correct Answer: B) 515 Hz. 38. What is one of the main differences between mechanical and electromagnetic waves? A) Electromagnetic waves do not transfer energy, but mechanical waves do. B) Electromagnetic do not have wavelengths but mechanical waves do. C) Electromagnetic waves do not need a medium to travel in but mechanical waves do. D) Electromagnetic waves are always transverse, mechanical waves are always longitudinal. Show Answer Correct Answer: C) Electromagnetic waves do not need a medium to travel in but mechanical waves do. 39. As a wavelength increases, the frequency A) Decreases. B) Increases. C) Stays the same. D) Fluctuates up and down. Show Answer Correct Answer: A) Decreases. 40. A single crest traveling through a medium is called a ..... A) Tomato. B) Amplitude. C) Wave. D) Pulse. Show Answer Correct Answer: D) Pulse. 41. Complete the sentence:The wavelength of a wave is A) The maximum displacement from the rest position. B) The time it takes for one complete oscillation of the wave. C) The number of waves per second. D) The distance between two successive points on a wave. Show Answer Correct Answer: D) The distance between two successive points on a wave. 42. A physics student takes her pulse and determines that her heart beats periodically 60 times in 60 seconds. The period of her heartbeat is A) 1 s. B) 60 s. C) 1 Hz. D) 60 Hz. Show Answer Correct Answer: A) 1 s. 43. List two examples of waves encountered in everyday life. A) Gamma rays and X-rays. B) Light waves and Radio waves. C) Protons and Electrons. D) None of the above. Show Answer Correct Answer: B) Light waves and Radio waves. 44. It occurs when the waves pass through a barrier or obstacle. A) Absorption. B) Reflection. C) Transmission. D) Diffraction. Show Answer Correct Answer: D) Diffraction. 45. What is the distance between adjacent identical parts of a wave called? A) Amplitude. B) Frequency. C) Wavelength. D) Period. Show Answer Correct Answer: C) Wavelength. 46. These wavelengths correspond to light in the visible section of the Electromagnetic Spectrum400nm, 470nm, 510nm, 650nmWhich wavelength corresponds to green light? A) 470nm. B) 400nm. C) 650nm. D) 510nm. Show Answer Correct Answer: D) 510nm. 47. What is the speed of a 20 Hz with a 4m wavelength? A) 0.2 m/s. B) 80 m/s. C) 5 m/s. D) 320 m/s. Show Answer Correct Answer: B) 80 m/s. 48. One use of radio waves is ..... A) Broadcasting and communications. B) Heating. C) Observing internal structure of objects. D) Sterilising food and medical equipment. Show Answer Correct Answer: A) Broadcasting and communications. 49. The waves are bouncing off a barrier or obstacle. A) Transmission. B) Diffraction. C) Refraction. D) Reflection. Show Answer Correct Answer: D) Reflection. 50. A sound wave has a frequency of 20 kHz and travels at a speed of 340 m/s. Calculate the wavelength of this wave. A) 0.017 m. B) ~ 0.059 m. C) ~ 59 m. D) 17 m. Show Answer Correct Answer: A) 0.017 m. 51. Constructive interference will cause the wave to A) Increase its displacement. B) Decrease its displacement. C) Make its displacement stay the same. D) None of the above. Show Answer Correct Answer: A) Increase its displacement. 52. Time period represents: A) Wave frequency. B) Wave amplitude. C) Time for one complete wave cycle. D) Wave speed. Show Answer Correct Answer: C) Time for one complete wave cycle. 53. What determines the loudness of a sound wave? A) Amplitude. B) Speed. C) Wavelength. D) Frequency. Show Answer Correct Answer: A) Amplitude. 54. Calculate the speed of a wave with a given frequency and wavelength. A) Speed = Frequency x Wavelength. B) Speed = Frequency / Wavelength. C) Speed = Wavelength-Frequency. D) Speed = Amplitude x Frequency. Show Answer Correct Answer: A) Speed = Frequency x Wavelength. 55. To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its A) Amplitude. B) Intensity. C) Refraction. D) Wavelength. Show Answer Correct Answer: D) Wavelength. 56. The highest point of a transverse wave is the ..... A) Period. B) Crest. C) Trough. D) Antinode. Show Answer Correct Answer: B) Crest. 57. In a Young's double-slit experiment the centre of a bright fringe occurs wherever waves from the slits differ in the distance they travel by a multiple of: A) Half a wavelength. B) Three-fourths of a wavelength. C) A wavelength. D) Quarter of a wavelength. Show Answer Correct Answer: C) A wavelength. 58. In visible light which color has the longest wavelength? A) Green. B) Red. C) Orange. D) Blue. Show Answer Correct Answer: B) Red. 59. Measure of the amount of energy a wave carries is ..... A) Amplitude. B) Resonance. C) Echo. D) Natural frequency. Show Answer Correct Answer: A) Amplitude. 60. The color of light is determined by the A) Amplitude. B) Wavelength. C) Crest. D) Speed. Show Answer Correct Answer: B) Wavelength. ← 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