This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 18 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Define "medium" and provide examples of different types. A) Substance through which a wave travels; air, water, and solids. B) Distance traveled by a wave; meters, kilometers, etc. C) Number of cycles per second; Hertz (Hz). D) Height of a wave; amplitude. Show Answer Correct Answer: A) Substance through which a wave travels; air, water, and solids. 2. What kind of waves do cellular telephones use to transmit and receive signals? A) Infrared Rays. B) Gamma Rays. C) Ultraviolet Rays. D) Microwaves. Show Answer Correct Answer: D) Microwaves. 3. What is the relationship between the frequency and energy of electromagnetic waves? A) They are unrelated. B) Frequency affects amplitude, not energy. C) They are directly proportional. D) They are inversely proportional. Show Answer Correct Answer: C) They are directly proportional. 4. What causes a sound to begin? A) Shifting. B) Bending. C) Vibrating. D) Spinning. Show Answer Correct Answer: C) Vibrating. 5. ..... affects how fast or slow sound waves travel. A) Temperature. B) Frequency. C) Speed. D) Amplitude. Show Answer Correct Answer: A) Temperature. 6. Frieda the fly flaps its wings back and forth 121 times each second. The period of the wing flapping is A) 121 s. B) 121 Hz. C) 0.008 Hz. D) 0.008 s. Show Answer Correct Answer: D) 0.008 s. 7. In a physics lab, a wave is created with a speed of 11.49 m/s. The length of the rope is 1.76 meters and the measurements are made for the 5th harmonic. What is the period? A) 6.53 s. B) 0.15s. C) 0.61 s. D) 1.63 s. Show Answer Correct Answer: C) 0.61 s. 8. What letter represents wavelength? A) Lambda. B) S. C) X. D) A. Show Answer Correct Answer: A) Lambda. 9. The material through which a wave travels A) Crest. B) Medium. C) Trough. D) Mechanical Wave. Show Answer Correct Answer: B) Medium. 10. An airplane that goes so fast that heat starts to become a critical factor A) Supersonic. B) Transonic. C) Subsonic. D) Hypersonic. Show Answer Correct Answer: D) Hypersonic. 11. What does a wave carry? A) Matter. B) Empty space. C) Water. D) Energy. Show Answer Correct Answer: D) Energy. 12. The number of cycles produced per unit time. A) Wavelength. B) Frequency. C) Wave speed. D) Amplitude. Show Answer Correct Answer: B) Frequency. 13. How would you describe the movement of matter in a transverse wave? A) Perpendicular to direction of energy. B) Parallel to the direction of energy. C) In zigzags. D) Linear. Show Answer Correct Answer: A) Perpendicular to direction of energy. 14. Which type of wave has particles that vibrate perpendicular to the direction of the wave? A) Electromagnetic waves. B) Transverse waves. C) Mechanical waves. D) Longitudinal waves. Show Answer Correct Answer: B) Transverse waves. 15. Which describes what is transferred by a wave? A) Energy and Matter. B) Just energy. C) Just matter. D) Neither energy nor matter. Show Answer Correct Answer: B) Just energy. 16. Which statement best describes the property of light waves illustrated in the diagram of a pencil in a glass of water? A) Some materials reflect light waves. B) Some materials absorb light waves. C) Light waves are emitted by some materials. D) Light waves are refracted by some materials. Show Answer Correct Answer: D) Light waves are refracted by some materials. 17. The Doppler Effect describes how wave frequency changes when: A) Observer is stationary. B) Wave amplitude increases. C) Wave source moves relative to an observer. D) Wave source is stationary. Show Answer Correct Answer: C) Wave source moves relative to an observer. 18. Sound travels slowest through ..... A) Solids. B) Liquids. C) Gases. D) The speed of sound is the same through all media. Show Answer Correct Answer: C) Gases. 19. Solve this problems using the equation:V = f * $\lambda$If an AM radio station broadcasts at 9.95 x 10$^{5}$ Hz, what is the wavelength of this radiation? A) 6.59 x 10$^{-28}$ m. B) 3.32 x 10$^{-3}$ m. C) 1.01 x 10$^{-6}$ m. D) 302 m. Show Answer Correct Answer: D) 302 m. 20. A wave completes two cycles in 30.0 s. What is the period of the wave? A) 15 s. B) 15 Hz. C) 0.033 Hz. D) 0.033 s. Show Answer Correct Answer: A) 15 s. 21. When a wave moves around a barrier or goes through an opening in a barrier is called ..... A) Diffraction. B) Reflection. C) Amplitude. D) Refraction. Show Answer Correct Answer: A) Diffraction. 22. The third harmonic on a string fixed at both ends shows A) A wavelength and a half. B) Half a wavelength. C) Two wavelengths. D) A wavelength. Show Answer Correct Answer: A) A wavelength and a half. 23. The interference pattern created by monochromatic light in an air wedge is used to measure the thickness of an object. Which of the following changes would cause the spacing between adjacent fringes to increase? A) Use a light source with a longer wavelength. B) Use a light source with a higher frequency. C) Use a shorter air wedge. D) Increase the thickness of the object being measured. Show Answer Correct Answer: A) Use a light source with a longer wavelength. 24. ..... is a form of energy that travels through the air. A) Wave. B) Volume. C) Sound. D) Energy. Show Answer Correct Answer: C) Sound. 25. When a part of the energy in the incident pulse is reflected and part passes, the phenomena is called ..... A) Refraction. B) Transmission. C) Doppler Effect. D) Reflection. Show Answer Correct Answer: B) Transmission. 26. The angle between the string of a pendulum at its equilibrium position and at its maximum displacement is the pendulum's A) Amplitude. B) Vibration. C) Period. D) Frequency. Show Answer Correct Answer: A) Amplitude. 27. CHECK YOUR UNDERSTANDINGVelocity = ..... Wavelength = 0.5mFrequency = 150 hertz A) 300 m/s. B) 75 m/s. C) 0.300 m/s. D) 0.75 m/s. Show Answer Correct Answer: B) 75 m/s. 28. Electromagnetic energy travels in waves. These waves can vary in their frequencies and wavelengths. Electromagnetic energy is classified by the length and frequency of its wave. Of the four waves types below, which has the lowest frequency? A) Radio Wave. B) Microwave. C) Visible Light. D) Infra Red rays. Show Answer Correct Answer: A) Radio Wave. 29. Momentum before a collision is equal to momentum after a collision. This is an example of ..... A) Newton's 4th Law. B) Conservation of energy. C) Conservation of momentum. D) Wave properties. Show Answer Correct Answer: C) Conservation of momentum. 30. What is the amplitude? A) Length. B) Height. C) # of waves. D) None of the above. Show Answer Correct Answer: B) Height. 31. Loudness is measured in A) Hertz (Hz). B) Decibels (dB). C) Watts (W). D) Meters (m). Show Answer Correct Answer: B) Decibels (dB). 32. The toughest a medium is, the slower will sound travel through it. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 33. Upon passing to a more optically dense medium the speed of the wave decreases along with ..... A) The frequency. B) The wavelength. C) All the above. D) None of the above. Show Answer Correct Answer: B) The wavelength. 34. A reflected sound wave is an ..... A) Echo. B) Resonance. C) Loudness. D) Speed of sound. Show Answer Correct Answer: A) Echo. 35. As the frequency of a wave increases, the period of the wave: A) Decreases. B) Increases. C) Remains the same. D) None of the above. Show Answer Correct Answer: A) Decreases. 36. Monochromatic coherent light shines through apair of slits. If the distance between these slits isdecreased, which of the following statements is/aretrue of the resulting interference pattern?I. The distance between the maxima stays thesameII. The distance between the maxima decreasesIII. The distance between the minima increasesIV. The distance between the maxima increases A) I only. B) I and III only. C) II and III only. D) III and IV only. Show Answer Correct Answer: D) III and IV only. 37. A mechanical wave can be either a ..... wave or a ..... wave. A) Tsunami; tidal. B) Transverse; longitudinal. C) Permanent; temporary. D) Hello; goodbye. Show Answer Correct Answer: B) Transverse; longitudinal. 38. Explain the concept of reflection of waves. A) Reflection of waves is the speeding up of waves when they hit a boundary. B) Reflection of waves is the bending of waves when they pass through a medium. C) Reflection of waves is the absorption of waves by a boundary. D) Reflection of waves is the bouncing back of a wave when it hits a boundary, with the angle of incidence being equal to the angle of reflection. Show Answer Correct Answer: D) Reflection of waves is the bouncing back of a wave when it hits a boundary, with the angle of incidence being equal to the angle of reflection. 39. Traveling Waves are waves that go from one place to another. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 40. What do you call bouncing back of a wave when it meets a surface or boundary that does not absorb the entire wave's energy. A) Absorption. B) Reflection. C) Transmission. D) Refraction. Show Answer Correct Answer: B) Reflection. 41. Remember velocity can be found using the formula velocity=frequency x wavelength. What is the velocity of a wave if the wavelength is 2.5 m and the frequency is .4 Hz? A) 100 m/s. B) 1 MHz. C) 10 m/s. D) 1 m/s. Show Answer Correct Answer: D) 1 m/s. 42. When a crest and a trough interfere, what occurs? A) They combine to create a higher amplitude wave. B) They interact to create a smaller amplitude wave. C) The wave changes into a longitudinal wave. D) None of the above. Show Answer Correct Answer: B) They interact to create a smaller amplitude wave. 43. A Repeated disturbance that carries energy through matter or space A) Wave. B) Trough. C) Crest. D) Energy. Show Answer Correct Answer: A) Wave. 44. What happens to the wave speed (v) of a guitar string when it is loosened without changing its length? A) Greater than Initial. B) Cannot be determined from the information provided. C) Same as Initial. D) Less than Initial. Show Answer Correct Answer: D) Less than Initial. 45. It occurs when the waves are taken up or enter by a material. A) Diffraction. B) Absorption. C) Refraction. D) Transmission. Show Answer Correct Answer: B) Absorption. 46. What happens when a wave spreads out after passing through a narrow opening? A) Diffraction. B) Refraction. C) Reflection. D) Absorption. Show Answer Correct Answer: A) Diffraction. 47. Hot drinks cool down quicker in black cups than white ones because: A) White is a good absorber and poor emitter of radiation. B) Black is a good absorber and emitter of radiation. C) Black is a good absorber and poor emitter of radiation. D) White is a good absorber and emitter of radiation. Show Answer Correct Answer: B) Black is a good absorber and emitter of radiation. 48. The number of wave cycles in a unit of time is the ..... A) Wavelength. B) Period. C) Frequency. D) Wave Speed. E) Amplitude. Show Answer Correct Answer: C) Frequency. 49. The bouncing back of a wave when it hits a surface that it cannot pass through is called ..... A) Refraction. B) Reflection. C) Diffraction. D) Resonance. Show Answer Correct Answer: B) Reflection. 50. When salt is placed on a speaker, what causes the salt to move up and down? A) The air particles. B) The amplitude. C) The vibrations of the speaker. D) None of the above. Show Answer Correct Answer: C) The vibrations of the speaker. 51. Which two animals use echolocation? A) Bats and humans. B) Bats and dolphins. C) Dolphins and humans. D) Dolphins and butterflies. Show Answer Correct Answer: B) Bats and dolphins. 52. If the period of an oscillation is 5 seconds, its frequency is: A) 5 s. B) 5 Hz. C) 0.2 s. D) 0.2 Hz. Show Answer Correct Answer: D) 0.2 Hz. 53. The narrower the gap, the ..... the diffracted waves are spread out. A) More. B) Less. C) All the above. D) None of the above. Show Answer Correct Answer: A) More. 54. What is the phenomenon called when light bounces off a surface? A) Reflection. B) Diffraction. C) Absorption. D) Refraction. Show Answer Correct Answer: A) Reflection. 55. A wave has a frequency of 540 Hz and is traveling at 340 m/s. What is its wavelength? A) 183600 m. B) 1.59 m. C) 0.63 m. D) 91800 m. Show Answer Correct Answer: C) 0.63 m. 56. A wave has a frequency of 14 Hz and a wavelength of 3 m. At what speed will this wave travel? A) 42 m. B) 4.67 Hz. C) 42 m/s. D) 4.67 m/s. Show Answer Correct Answer: C) 42 m/s. 57. The two types of mechanical waves are ..... and ..... A) Force, Vibration. B) Longitudinal, Transverse. C) Rarefraction, Compression. D) Light, Sound. Show Answer Correct Answer: B) Longitudinal, Transverse. 58. Discuss the applications of black body radiation in everyday life. A) Black body radiation is applied in clothing to regulate body temperature. B) Black body radiation is utilized in car engines for fuel efficiency. C) Black body radiation is used in smartphones for wireless charging. D) Various applications include cooking appliances, thermal imaging cameras, solar panels, and incandescent light bulbs. Show Answer Correct Answer: D) Various applications include cooking appliances, thermal imaging cameras, solar panels, and incandescent light bulbs. 59. Find the wavelength of a wave that has a frequency of 400 Hz traveling at 300 m/s A) 1.33m. B) 120, 000m. C) 100m. D) 0.75m. Show Answer Correct Answer: D) 0.75m. 60. Loudness can be measured by a unit called ..... A) Ounces (oz). B) Decibel (dB). C) Kilometers (km). D) Hertz (Hz). Show Answer Correct Answer: B) Decibel (dB). ← 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