This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When light enters a medium with a higher refractive index, it bends ..... the normal A) Towards. B) Away from. C) All the above. D) None of the above. Show Answer Correct Answer: A) Towards. 2. How does the temperature of a black body affect the wavelength of the emitted radiation? A) The wavelength of the emitted radiation remains constant. B) The wavelength of the emitted radiation becomes negative. C) The wavelength of the emitted radiation decreases. D) The wavelength of the emitted radiation increases. Show Answer Correct Answer: C) The wavelength of the emitted radiation decreases. 3. Which wave has the largest wavelength? A) X ray. B) Radio. C) Visible light. D) Gamma ray. Show Answer Correct Answer: B) Radio. 4. Bending of sound waves through openings A) Reflection. B) Interference. C) Diffraction. D) Refraction. Show Answer Correct Answer: C) Diffraction. 5. True or False:Black body radiation is independent of the material of the body. A) True. B) False. C) Partially true. D) Depends on the temperature. Show Answer Correct Answer: A) True. 6. Diffracted waves spread out ..... if the gap is wider. A) More. B) Less. C) The same. D) None of the above. Show Answer Correct Answer: B) Less. 7. Name two uses of Ultraviolet radiation A) Security ink and tanning lamps. B) Communications and cooking. C) Cooking and tanning lamps. D) Fibre optic cables and medical scans. Show Answer Correct Answer: A) Security ink and tanning lamps. 8. The lowest part of a transverse wave are the A) Wave points. B) Low nodules. C) Crests. D) Troughs. Show Answer Correct Answer: D) Troughs. 9. Why can dogs hear frequencies above the range of human hearing? A) Because they have more sensitive ears. B) Because they have better ears. C) Because they have a different ear structure. D) Because they have a higher pitch. Show Answer Correct Answer: D) Because they have a higher pitch. 10. What is the relationship between wavelength and frequency in electromagnetic waves? A) Wavelength and frequency have no relationship in electromagnetic waves. B) Wavelength and frequency are inversely related in electromagnetic waves. C) Wavelength and frequency are directly related in electromagnetic waves. D) Increasing frequency leads to longer wavelengths in electromagnetic waves. Show Answer Correct Answer: B) Wavelength and frequency are inversely related in electromagnetic waves. 11. Sound beyond 20, 000 Hz is called A) Megasound. B) Infrasound. C) Ultrasound. D) Supersound. Show Answer Correct Answer: C) Ultrasound. 12. What is measured from crest to crest or trough to trough? A) Wavelength. B) Amplitude. C) Frequency. D) Origin. Show Answer Correct Answer: A) Wavelength. 13. What do we call sound waves below 20 Hz? A) Loud sounds. B) Infrasound. C) Quiet sounds. D) Ultrasound. Show Answer Correct Answer: B) Infrasound. 14. The number of wave cycles in a given unit of time is called the wave ..... A) Wave Length. B) Frequency. C) Amplitude. D) Wave Height. Show Answer Correct Answer: B) Frequency. 15. Which of the following is sound unable to travel through? A) Air. B) Water. C) Gas. D) Vacuum / Space. Show Answer Correct Answer: D) Vacuum / Space. 16. The maximum displacement in the positive direction, or highest point, on a transverse wave is: A) The crest. B) The top. C) The trough. D) The coast. Show Answer Correct Answer: A) The crest. 17. It is the lowest point of a wave. A) Crest. B) Trough. C) Wavelength. D) Amplitude. Show Answer Correct Answer: B) Trough. 18. States that the force acting on a spring is directly proportional to the amount the spring is stretched A) Doppler effect. B) Hooke's law. C) Law of reflection. D) Node. Show Answer Correct Answer: B) Hooke's law. 19. What is the speed of sound in air approximately? A) 330 m/s. B) 250 m/s. C) 500 m/s. D) 1000 m/s. Show Answer Correct Answer: A) 330 m/s. 20. What is the wave equation? A) Wave speed = frequency / wavelength. B) Wave speed = frequency x wavelength. C) Wave speed = wavelength / frequency. D) None of the above. Show Answer Correct Answer: B) Wave speed = frequency x wavelength. 21. The speed of a wave is equal to: A) The amplitude multiplied by the frequency. B) The wavelength multiplied by the frequency. C) The amplitude divided by the frequency. D) The wavelength divided by the frequency. Show Answer Correct Answer: B) The wavelength multiplied by the frequency. 22. What happens to the speed of light waves when they pass from air (less optically dense) to glass (more optically dense)? A) The speed remains constant. B) The speed increases. C) The speed decreases. D) The speed becomes zero. Show Answer Correct Answer: C) The speed decreases. 23. If a wave has a period of (T) of 0.0167 sec, then it's frequency is ..... A) .0167 HZ. B) 20 m. C) Diurnal. D) 60 Hz. Show Answer Correct Answer: D) 60 Hz. 24. Put the following in the order of wavelength, starting with the longest A) Ultraviolet, X-rays, gamma rays. B) Gamma rays, X-rays, ultraviolet. C) Ultraviolet, light, infrared. D) X-rays, gamma rays, Ultraviolet. Show Answer Correct Answer: A) Ultraviolet, X-rays, gamma rays. 25. Refraction occurs because ..... A) Light is bent by gravity. B) Surfaces are bent and bend the light. C) We do not know. D) The light changes speed as it enters a new medium. Show Answer Correct Answer: D) The light changes speed as it enters a new medium. 26. Which of the following statements best describes the Doppler Effect? A) It causes waves to bend around obstacles. B) It changes the color of light waves. C) All the above. D) None of the above. Show Answer Correct Answer: B) It changes the color of light waves. 27. A pendulum has oscillated 80 times in 16 seconds. A) The frequency is 4 Hz. B) The frequency is 5 Hz. C) The frequency is 0.4 Hz. D) The frequency is 0.2 Hz. Show Answer Correct Answer: B) The frequency is 5 Hz. 28. What are the three primary colours of light? A) Red, White and Blue. B) Red, Yellow and Blue. C) Red, Green and Blue. D) Red, Magenta and Blue. Show Answer Correct Answer: C) Red, Green and Blue. 29. What is the definition for the word amplitude? A) The number of complete waves that pass per second. B) The distance from the peak of one wave to the peak of an adjacent wave. C) The maximum distance from the equilibrium position of any point on a wave. D) The distance from the equilibrium position of a peak plus the same distance from a trough. Show Answer Correct Answer: C) The maximum distance from the equilibrium position of any point on a wave. 30. What is the definition of a wavefront? A) The time it takes for one complete wave to pass a certain point. B) The number of complete waves that occur in one second. C) The distance from one point on a wave to the same point on the next wave. D) The vibrating part of a wave. Show Answer Correct Answer: D) The vibrating part of a wave. 31. A mechanic wave needs a medium to travel. A) Truth. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) Truth. 32. Describe the difference between a "transverse" and "longitudinal" wave. A) Transverse waves have higher amplitude. B) Longitudinal waves move perpendicular to the direction of the wave. C) Transverse waves. D) None of the above. Show Answer Correct Answer: C) Transverse waves. 33. State the difference between constructive and destructive interference of waves. A) Constructive interference results in a wave with smaller amplitude. B) Destructive interference results in a wave with larger amplitude. C) Constructive interference results in a wave with no change in amplitude. D) Constructive interference results in a wave with larger amplitude, while destructive interference results in a wave with smaller amplitude. Show Answer Correct Answer: D) Constructive interference results in a wave with larger amplitude, while destructive interference results in a wave with smaller amplitude. 34. Sound needs a medium to travel through. What is a medium? A) Solid, liquid, gas. B) Open space. C) Nothing. D) Waves. Show Answer Correct Answer: A) Solid, liquid, gas. 35. Light waves are classified as: A) Longitudinal waves. B) Transverse waves. C) Quantum waves. D) Gravitational waves. Show Answer Correct Answer: B) Transverse waves. 36. What type of wave is used for medical and industrial imaging? A) Ultrasound waves. B) Infrared waves. C) Radio waves. D) Microwaves. Show Answer Correct Answer: A) Ultrasound waves. 37. If there is no wave, the particles would be at the ..... A) Resting point. B) Beach. C) Trough. D) Wavelength. Show Answer Correct Answer: A) Resting point. 38. What is the unit for wavelength? A) S. B) M. C) M/s. D) Hz. Show Answer Correct Answer: B) M. 39. The dopple effect changes the A) Speed. B) Frequency. C) Direction. D) None of the above. Show Answer Correct Answer: B) Frequency. 40. During a scientific investigation, which step will a scientist likely perform first? A) Collect and organize data. B) Define the problem for investigation. C) Plan the experimental procedure. D) Defend conclusions drawn from data. Show Answer Correct Answer: B) Define the problem for investigation. 41. Compared to the wavelength and energy of the gamma ray photon, the microwave photon has a A) Shorter wavelength and less frequency. B) Shorter wavelength and more frequency. C) Longer wavelength and less frequency. D) Longer wavelength and more frequency. Show Answer Correct Answer: C) Longer wavelength and less frequency. 42. An interaction that occurs when 2 waves meet is known as what? A) Diffraction. B) Standing wave. C) Interference. D) Polarization. Show Answer Correct Answer: C) Interference. 43. For a system in simple harmonic motion, which of the following is the number of cycles per second? A) Period. B) Revolution. C) Amplitude. D) Frequency. Show Answer Correct Answer: D) Frequency. 44. Which electromagnetic wave is commonly used for mobile phone communication? A) Infrared waves. B) Microwaves. C) Ultraviolet waves. D) Radio waves. Show Answer Correct Answer: D) Radio waves. 45. When light shines through a prism it creates a ..... A) Spectrum. B) ROY G. BIV. C) Electromagnetic wave. D) Colors. Show Answer Correct Answer: A) Spectrum. 46. When magenta and green light are shone in one place the resulting colour is ..... A) Green. B) Brown. C) White. D) Yellow. Show Answer Correct Answer: C) White. 47. What occurs when a wave strikes an object andbounces off of it? A) Reflection. B) Rarefaction. C) Amplitude. D) Compression. Show Answer Correct Answer: A) Reflection. 48. A water wave has a period of 0.25 seconds and a wavelength of 0.6 meters. What is the speed of the wave? A) 2.1 meters. B) 0.85 meters. C) 0.15 meters. D) 2.4 meters. Show Answer Correct Answer: D) 2.4 meters. 49. What is the time for one complete wave cycle called? A) Amplitude. B) Frequency. C) Wavelength. D) Period. Show Answer Correct Answer: D) Period. 50. Sounds waves travel through a medium by A) A vacuum. B) Particles moving from one place to another. C) Energy being transferred between particles. D) Particles remaining stationary. Show Answer Correct Answer: C) Energy being transferred between particles. 51. Which of the following is the height of the wave measured from the rest position? A) Amplitude. B) Rarefaction. C) Frequency. D) Period. Show Answer Correct Answer: A) Amplitude. 52. Which wavelength is the most powerful? A) Microwaves. B) Radio waves. C) X-rays/gamma rays. D) None of the above. Show Answer Correct Answer: C) X-rays/gamma rays. 53. What is the relationship between frequency and wavelength? A) Frequency and wavelength are directly related. B) Wavelength has no effect on frequency. C) Frequency and wavelength are inversely related. D) Frequency increases with increasing wavelength. Show Answer Correct Answer: C) Frequency and wavelength are inversely related. 54. What type of wave move a slinky back and forth? A) Longitudinal. B) Transverse. C) All the above. D) None of the above. Show Answer Correct Answer: A) Longitudinal. 55. The number of waves produced per unit time. A) Frequency. B) Wave speed. C) Amplitude. D) Wavelength. Show Answer Correct Answer: A) Frequency. 56. What causes the change in direction when light travels from air into glass? A) The frequency of the light changes. B) The speed of the light changes. C) The amplitude of the light changes. D) The colour of the light changes. Show Answer Correct Answer: B) The speed of the light changes. 57. Which of the following electromagnetic waves has the lowest frequency? A) Microwave. B) Infrared wave. C) Visible light wave. D) Gamma ray. Show Answer Correct Answer: A) Microwave. 58. The highest point on a transverse wave is: A) The crest. B) The top. C) The trough. D) The coast. Show Answer Correct Answer: A) The crest. 59. The bending of waves as they pass from one medium to another is called A) Diffraction. B) Refraction. C) Reflection. D) Interference. Show Answer Correct Answer: B) Refraction. 60. What is the unit of measurement for lens power? A) Watt. B) Dioptres. C) Ampere. D) Volt. Show Answer Correct Answer: B) Dioptres. ← 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