This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 22 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 22 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What are the units of measurement for frequency? A) Hertz (Hz). B) Newtons. C) Meters. D) Seconds. Show Answer Correct Answer: A) Hertz (Hz). 2. What is the wavelength? A) Length. B) Height. C) # of waves. D) None of the above. Show Answer Correct Answer: A) Length. 3. What is the role of the sun as a light source? A) The sun is a secondary light source that only reflects light from the moon. B) The sun serves as the primary light source for Earth, enabling life and regulating environmental conditions. C) The sun primarily provides heat without any light for Earth. D) The sun's role is to create darkness and cool the planet. Show Answer Correct Answer: B) The sun serves as the primary light source for Earth, enabling life and regulating environmental conditions. 4. Increasing the frequency of a sound wave produces a sound with A) Lower speed. B) Greater loudness. C) Greater pitch. D) Longer wavelength. Show Answer Correct Answer: C) Greater pitch. 5. A graph of sound wave pressure against time shows the A) Wavelength of the wave. B) Frequency of the wave. C) Speed of the wave. D) Amplitude of the wave. Show Answer Correct Answer: D) Amplitude of the wave. 6. When the sound source has already passed you, it appears that the sound's ..... A) Frequency increases. B) Wavelength decreases. C) Velocity decreases. D) Pitch decreases. Show Answer Correct Answer: D) Pitch decreases. 7. What type of lens is used to focus light to a point? A) Flat lens. B) Convex lens. C) Cylindrical lens. D) Concave lens. Show Answer Correct Answer: B) Convex lens. 8. 1) What is the frequency of a wave that has a period of 2.11 min? A) 0.00790 Hz. B) 2.70 Hz. C) 0.474 Hz. D) 127 Hz. Show Answer Correct Answer: A) 0.00790 Hz. 9. If you look at a magenta T-Shirt with green filter glasses on it will look A) Brown. B) Black. C) Red. D) White. Show Answer Correct Answer: B) Black. 10. A dolphin sends out a sound wave. An echo returns 0.010s later from a fish which is 7.5m from the dolphin. What is the speed of the sound wave in water? A) 0.075m/s. B) 750m/s. C) 0.15m/s. D) 1500m/s. Show Answer Correct Answer: D) 1500m/s. 11. A Mechanical Wave needs a ..... to travel. A) Medium. B) Amplitude. C) Force. D) Vibration. Show Answer Correct Answer: A) Medium. 12. Which of the following best describes the Doppler effect? A) Diffraction of waves around an obstacle. B) Change in wave frequency due to the motion of the source or observer. C) Interference of two waves of the same frequency. D) Reflection of waves from a surface. Show Answer Correct Answer: B) Change in wave frequency due to the motion of the source or observer. 13. How does wave diffraction affect the spreading of waves? A) Wave diffraction causes waves to decrease in amplitude. B) Wave diffraction has no effect on the spreading of waves. C) Wave diffraction causes waves to move in a straight line. D) Wave diffraction causes waves to spread out. Show Answer Correct Answer: D) Wave diffraction causes waves to spread out. 14. What is the key to understanding the Universe according to the text? A) Light and its properties. B) Gravity. C) Black holes. D) Time travel. Show Answer Correct Answer: A) Light and its properties. 15. Sound does not travel in ..... A) Liquids. B) Solids. C) Empty space. D) Gases. Show Answer Correct Answer: C) Empty space. 16. Longitudinal waves never need a medium to transport energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 17. Explain the concept of standing wave patterns. A) Standing wave patterns are formed due to the interference of two waves with the same frequency and amplitude traveling in opposite directions, resulting in nodes and antinodes. B) Standing wave patterns are always stationary and do not change over time. C) Standing wave patterns only have nodes and no antinodes. D) Standing wave patterns are caused by the collision of two waves with different frequencies. Show Answer Correct Answer: A) Standing wave patterns are formed due to the interference of two waves with the same frequency and amplitude traveling in opposite directions, resulting in nodes and antinodes. 18. An electromagnetic wave in a vacuum has a wavelength of 0.07 m. What is its frequency in Hz? A) 2.1 x 10$^{6 }$Hz. B) 4.3 x 10$^{9 }$Hz. C) 4.3 x 10$^{18 }$Hz. D) 2.1 x 10$^{16 }$Hz. Show Answer Correct Answer: B) 4.3 x 10$^{9 }$Hz. 19. What is the phenomenon of sound wave bouncing back from a barrier? A) Refraction. B) Reflection. C) Interference. D) Diffraction. Show Answer Correct Answer: B) Reflection. 20. The matter through which a mechanical wave travels is called a A) Conductor. B) Frequency. C) Wavelength. D) Medium. Show Answer Correct Answer: D) Medium. 21. Does a constructive interference have a higher or lower amplitude A) Higher. B) Lower. C) Middle. D) None of the above. Show Answer Correct Answer: A) Higher. 22. All waves can be reflected and refracted. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. Which best describes the order of the technology used to transmit a sound through the radio? A) Radio $\rightarrow$ transmitter $\rightarrow$ microphone. B) Radio $\rightarrow$ transmitter $\rightarrow$ radio. C) Microphone $\rightarrow$ transmitter $\rightarrow$ radio. D) Microphone $\rightarrow$ transmitter $\rightarrow$ microphone. Show Answer Correct Answer: C) Microphone $\rightarrow$ transmitter $\rightarrow$ radio. 24. What is the wavelength of the fundamental frequency of a standing wave? A) Dependent on the tension of the string or medium. B) Half the length of the string or medium. C) Equal to the length of the string or medium. D) Twice the length of the string or medium. Show Answer Correct Answer: D) Twice the length of the string or medium. 25. What is the speed of a wave with a wavelength of 2 m and a frequency of 2.5 s? A) 2.5 m/s. B) 4.5 m/s. C) 5 m/s. D) 6 m/s. Show Answer Correct Answer: C) 5 m/s. 26. In the photoelectric effect which of the following increase when the intensity of the light incident on the metal plate is increased? A) The threshold frequency. B) The frequency of the photons. C) The maximum kinetic energy of the photoelectrons. D) The number of photons emitted per second. Show Answer Correct Answer: D) The number of photons emitted per second. 27. What does one observe on the screen in a Young's experiment if white light illuminates the double slit instead of light of a single wavelength? A) A white central fringe and no other fringes. B) A dark central fringe and a series of alternating white and dark fringes on each side of the center. C) A white central fringe and a series of colored and dark fringes on each side of the center. D) A continuous band of colors with no dark fringes anywhere. Show Answer Correct Answer: C) A white central fringe and a series of colored and dark fringes on each side of the center. 28. What is the role of frequency in black body radiation? A) Frequency determines the color of the radiation. B) Frequency has no impact on black body radiation. C) Frequency determines the energy of the photons emitted. D) Frequency affects the temperature of the black body. Show Answer Correct Answer: C) Frequency determines the energy of the photons emitted. 29. What is the direction of vibrations in a longitudinal wave? A) 90$^\circ$ to the direction of wave travel. B) Away from the direction of wave travel. C) Towards the direction of wave travel. D) In the same direction as the wave travel. Show Answer Correct Answer: D) In the same direction as the wave travel. 30. What is transferred by a wave? A) Energy. B) Mass. C) Matter. D) Particles. Show Answer Correct Answer: A) Energy. 31. Waves caused by earthquakes are known as A) Frequency waves. B) Standing waves. C) Seismic waves. D) Electromagnetic waves. Show Answer Correct Answer: C) Seismic waves. 32. As waves move forward, only ..... is carried by the waves. A) Air. B) Energy. C) Matter. D) Particles. Show Answer Correct Answer: B) Energy. 33. Compressions and rarefactions are characteristic of: A) Transverse waves. B) Longitudinal waves. C) Electromagnetic waves. D) Standing waves. Show Answer Correct Answer: B) Longitudinal waves. 34. Which of the following statements provide a reason why the diffraction of light is NOT usually observed? A) It's wavelength is too small. B) It's frequency is too high. C) It's speed is too high. D) It's wavelength is too large. Show Answer Correct Answer: A) It's wavelength is too small. 35. EM waves used in checking the authenticity of bank notes A) Ultraviolet. B) X-ray. C) Microwave. D) Infrared. Show Answer Correct Answer: A) Ultraviolet. 36. How does the tension in a string affect the speed of a standing wave? A) The tension in a string has no impact on the speed of a standing wave. B) Increasing tension decreases the speed of a standing wave. C) Decreasing tension increases the speed of a standing wave. D) The tension in a string affects the speed of a standing wave by directly influencing the wave speed. Show Answer Correct Answer: D) The tension in a string affects the speed of a standing wave by directly influencing the wave speed. 37. A wave has a frequency of 8 Hz and a wavelength of 4 meters. What is the speed of the wave? A) 2 m/sec. B) 0.5 m/sec. C) 12 m/sec. D) 32 m/sec. Show Answer Correct Answer: D) 32 m/sec. 38. What does the refractive index indicate? A) The frequency of the wave. B) How much a wave slows down in a medium. C) The speed of light in vacuum. D) The amplitude of the wave. Show Answer Correct Answer: B) How much a wave slows down in a medium. 39. What happens to the pitch of a sound as the source moves towards you? A) The pitch of the sound increases. B) The pitch of the sound remains the same. C) The pitch of the sound decreases. D) The pitch of the sound becomes silent. Show Answer Correct Answer: A) The pitch of the sound increases. 40. Waves can carry both energy and matter A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 41. Which of these has the longest wavelength? A) Ultraviolet. B) Visible light. C) Infrared. D) Microwave. Show Answer Correct Answer: D) Microwave. 42. Which statement correctly compares radio waves and X-rays? A) Radio waves have a longer wavelength and a greater speed in a vacuum. B) Radio waves have a longer wavelength and the same speed in a vacuum. C) Radio waves have a shorter wavelength and a greater speed in a vacuum. D) Radio waves have a shorter wavelength and the same speed in a vacuum. Show Answer Correct Answer: B) Radio waves have a longer wavelength and the same speed in a vacuum. 43. What is wave refraction? A) The reflection of waves off a surface. B) The bending of waves as they pass from one medium to another due to a change in their speed. C) The amplification of waves as they travel through a medium. D) The absorption of waves by a medium. Show Answer Correct Answer: B) The bending of waves as they pass from one medium to another due to a change in their speed. 44. Which wave has the highest energy of those listed? A) Radio. B) Infrared. C) Uv. D) Visible light. Show Answer Correct Answer: C) Uv. 45. The medium vibrates perpendicular to the direction the wave travels in a ..... A) Parade wave. B) Standing wave. C) Compressional wave. D) Transverse wave. Show Answer Correct Answer: D) Transverse wave. 46. What is the frequency (in waves per second) of a wave that has 15 waves pass a point in 30 seconds? A) 150 waves/second. B) 450 waves/second. C) 2 waves/second. D) .5 waves/second. Show Answer Correct Answer: D) .5 waves/second. 47. Radio waves and ..... are used in communication A) Gamma rays. B) Microwaves. C) Ultraviolet. D) Visible light. Show Answer Correct Answer: B) Microwaves. 48. What happens to a wave as you increase the period from 1 second to 7 seconds? A) The wavelength will become shorter. B) The wave speed will decrease. C) The wave speed will increase. D) The frequency would decrease. Show Answer Correct Answer: D) The frequency would decrease. 49. What part of the electromagnetic spectrum can be seen by humans? A) Ultraviolet. B) Microwaves. C) Infrared. D) Visible light. Show Answer Correct Answer: D) Visible light. 50. When light enters a denser medium, what happens to its speed? A) It fluctuates. B) It decreases. C) It increases. D) It remains the same. Show Answer Correct Answer: B) It decreases. 51. How does the frequency of a standing wave change when the tension in the string is increased? A) The frequency of the standing wave remains constant. B) The frequency of the standing wave becomes negative. C) The frequency of the standing wave decreases. D) The frequency of the standing wave increases. Show Answer Correct Answer: D) The frequency of the standing wave increases. 52. What is the speed of electromagnetic waves in a vacuum? A) 300, 000, 000 meters per second. B) 150, 000, 000 meters per second. C) 299, 792, 458 meters per second. D) 1, 000, 000 meters per second. Show Answer Correct Answer: C) 299, 792, 458 meters per second. 53. What happens to the wavelength of a wave if its frequency is halved, assuming the speed remains constant? A) It remains the same. B) It quadruples. C) It doubles. D) It halves. Show Answer Correct Answer: C) It doubles. 54. Mechanical waves usually travel fastest through: A) Solids. B) Liquids. C) Gases. D) None of the above. Show Answer Correct Answer: A) Solids. 55. What is the combination of two waves at the same location called? A) Interference. B) Reflection. C) Superposition. D) Refraction. Show Answer Correct Answer: C) Superposition. 56. If a seagull sitting in water bobs up and down once every 2 seconds and the distance between two crests of the water wave is 3 m, what is the velocity of the wave (in m/s)? A) $1.5$. B) 1.5 Mathematical EquivalenceON. C) All the above. D) None of the above. Show Answer Correct Answer: A) $1.5$. 57. Jim taps the table while Mark had his hands on the table. Cindy was not touching the table but heard the tapping after Mark did. Why would Mark hear or feel the tapping first? A) Sound travels through air and wood at different speeds. B) The taps only made the table vibrate, they did not make the air vibrate. C) The frequency of the taps was different in wood than in air. D) None of the above. Show Answer Correct Answer: A) Sound travels through air and wood at different speeds. 58. The difference between mechanical and electromagnetic waves is: A) Electromagnetic waves can travel through no medium (a vacuum). B) They have different wavelengths. C) Mechanical waves can travel through no medium (a vacuum). D) Nothing. Show Answer Correct Answer: A) Electromagnetic waves can travel through no medium (a vacuum). 59. One point on a wave to the exact same point on the next wave A) Amplitude. B) Wavelength. C) Frequency. D) None of the above. Show Answer Correct Answer: B) Wavelength. 60. Which correctly orders the EM spectrum from longest to shortest wavelength? A) Infrared, Microwaves, Radio waves, Visible light, Ultraviolet, Gamma rays, X-rays. B) Gamma rays, X-rays, Ultraviolet, Visible light, Infrared, Microwaves, Radio waves. C) Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays. D) Visible light, Infrared, Microwaves, Gamma rays, X-rays, Ultraviolet, Radio waves. Show Answer Correct Answer: C) Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, X-rays, Gamma rays. ← 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