This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The electrical field and magnetic field of electromagnetic wave are ..... A) Parallel. B) Perpendicular. C) Symmetrical. D) All of the above. Show Answer Correct Answer: B) Perpendicular. 2. What determines the speed of a wave according to the video? A) The wave's amplitude. B) The loudness of the wave. C) The medium it travels through. D) The wave's frequency. Show Answer Correct Answer: C) The medium it travels through. 3. Water waves travel from deeper water to more shallow water. This causes them to refract. Which property always remains the same when refraction occurs? A) Speed. B) Wavelength. C) Frequency. D) Amplitude. Show Answer Correct Answer: C) Frequency. 4. A ray of light strikes a mirror. The angle between the incident ray and reflected ray is 60$^\circ$. What is the angle of incidence? A) 30$^\circ$. B) 45$^\circ$. C) 120$^\circ$. D) 60$^\circ$. Show Answer Correct Answer: A) 30$^\circ$. 5. What is the formula to calculate the refractive index of glass when light enters from air? A) N = cos(i) / cos(r). B) N = sin(i) / sin(r). C) N = sec(i) / sec(r). D) N = tan(i) / tan(r). Show Answer Correct Answer: B) N = sin(i) / sin(r). 6. When comparing the wave characteristics of an incident and transmitted wave in two different media, one can be sure that the wavelength will be ..... A) Greatest in the least dense medium. B) Smallest in the least dense medium. C) The same regardless of the density of the medium. D) None of the above. Show Answer Correct Answer: A) Greatest in the least dense medium. 7. Use "crest" and "trough" in a sentence to describe wave characteristics. A) The crest is the lowest point of a wave. B) The trough is the highest point of a wave. C) The crest is the highest point, and the trough is the lowest point. D) The trough is the highest point, and the crest is the lowest point. Show Answer Correct Answer: C) The crest is the highest point, and the trough is the lowest point. 8. A car horn has a frequency of 400 Hz. The car is moving away from an intersection at 20 m s$^{-1}$. The frequency heard by a person standing at the frequency would be A) Greater than 400 Hz. B) Less than 400 Hz. C) 400 Hz. D) Greater than 400 Hz and then less than 400 Hz. Show Answer Correct Answer: B) Less than 400 Hz. 9. The pitch of a sound is most closely related to the A) Intensity of the sound. B) Distance from the sound source. C) Frequency of the sound waves. D) Medium through which the sound travels. Show Answer Correct Answer: C) Frequency of the sound waves. 10. Which of the following statements best describes the law of reflection? A) The angle of incidence is greater than the angle of reflection. B) The angle of reflection is greater than the angle of incidence. C) The angle of incidence is equal to the angle of reflection. D) None of the above. Show Answer Correct Answer: C) The angle of incidence is equal to the angle of reflection. 11. What is the calculation to find the time period of a sound wave? A) Time period = frequency. B) Time period = 1/frequency. C) Time period = speed. D) Time period = wavelength. Show Answer Correct Answer: B) Time period = 1/frequency. 12. When Red, Green and Blue light are shone onto one area the resulting colour is ..... A) Brown. B) Yellow. C) White. D) Black. Show Answer Correct Answer: C) White. 13. Which of the following factors does NOT affect the speed of sound? A) State of matter of the medium. B) Density of the medium. C) Frequency of the sound. D) Temperature. Show Answer Correct Answer: C) Frequency of the sound. 14. What happens to the wavelength of a wave if its frequency increases, assuming the speed remains constant? A) The wavelength increases. B) The wavelength decreases. C) The wavelength becomes zero. D) The wavelength remains the same. Show Answer Correct Answer: B) The wavelength decreases. 15. What is the range of frequency for Infrasound? A) Below 20 Hz. B) 20-20k Hz. C) Above 20k Hz. D) 10-10k Hz. Show Answer Correct Answer: A) Below 20 Hz. 16. TRUE OR FALSE:Radio is a type of transverse wave A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 17. Differentiate between a wave's "crest" and "trough." A) Crest is the highest point, and trough is the lowest point. B) Trough is the highest point, and crest is the lowest point. C) Both refer to the highest point. D) Both refer to the lowest point. Show Answer Correct Answer: A) Crest is the highest point, and trough is the lowest point. 18. One wavelength is the distance between adjacent peaks or troughs. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. Which type of graph best represents an analog signal? A) Bar Graph. B) Line Graph. C) All the above. D) None of the above. Show Answer Correct Answer: B) Line Graph. 20. Which list places the electromagnetic energies in order from most energy to least energy? A) Ultraviolet, Inferred, Radio. B) Visible, Ultraviolet, X-Ray. C) Radio, Visible, Gamma. D) X-ray, Radio, Visible. Show Answer Correct Answer: A) Ultraviolet, Inferred, Radio. 21. A wave has frequency of 5 Hz and a speed of 30 m/s. What is the wavelength of the wave? A) 150 m. B) 5 m. C) 6 m. D) 30 m. Show Answer Correct Answer: C) 6 m. 22. The distance between the peak of a wave and the equilibrium position. A) Frequency. B) Amplitude. C) Wavelength. D) Pitch. Show Answer Correct Answer: B) Amplitude. 23. Electromagnetic waves are made up of oscillating ..... A) Particles. B) Protons. C) Electric and magnetic fields. D) Electric fields. Show Answer Correct Answer: C) Electric and magnetic fields. 24. An observer hears a sound wave emitted from a moving source. The observed frequency is less than the frequency of sound emitted from the source. What could be the reason for this? A) The source is moving towards the observer. B) The speed of the sound wave in air decreases due to the movement of the source. C) The speed of the sound wave in air increases due to the movement of the source. D) The source is moving away from the observer. Show Answer Correct Answer: D) The source is moving away from the observer. 25. What happens when a pulse reaches the fixed end of a rope? A) The pulse is reflected as a crest. B) The pulse disappears. C) The pulse continues to travel in the same direction. D) The pulse is reflected as a trough. Show Answer Correct Answer: D) The pulse is reflected as a trough. 26. Your Mom wishes to make a simple pendulum that serves as a timing device. She plans to make it such that its period is 1.00 second. What length must the pendulum have? A) More than 1 meter. B) .25 m. C) 1 m. D) .5 m. Show Answer Correct Answer: B) .25 m. 27. The correct unit for wavelength is: A) S. B) M/s. C) Hz. D) M. Show Answer Correct Answer: D) M. 28. Mechanical waves and Electromagnetic waves have what in common? A) Requires a medium and is called light. B) No net transfer of matter and they transmit energy. C) Longitudinal and traverse. D) None of these options. Show Answer Correct Answer: B) No net transfer of matter and they transmit energy. 29. Waves move ..... through vibrations A) Energy. B) Matter. C) Mass. D) Weight. Show Answer Correct Answer: A) Energy. 30. Fill in the blank:The time period of a wave is the ..... it takes to complete one full cycle. A) Distance. B) Speed. C) Frequency. D) Time. Show Answer Correct Answer: D) Time. 31. 1) A dog in a car with the window down howls with a sound at 433 Hz. The car is moving at 55.3 mph toward a cyclist moving at 23.4 mph toward the car. a. What is the frequency of the sound the cyclist hears? A) 416 Hz. B) 481 Hz. C) 551 Hz. D) 183 Hz. Show Answer Correct Answer: B) 481 Hz. 32. The ..... determines the color of visible light. A) Light. B) Color. C) Speed. D) Wavelength. Show Answer Correct Answer: D) Wavelength. 33. As objects get warmer they always emit A) A. More infra red radiation. B) B. More visible radiation. C) C. Less infra red radiation. D) None of the above. Show Answer Correct Answer: A) A. More infra red radiation. 34. Which tool can be used to separate white light into colors of the visible spectrum? A) Wave. B) Prism. C) Lens. D) Mirror. Show Answer Correct Answer: B) Prism. 35. Which of the following is a type of longitudinal wave? A) Sound wave. B) Microwave. C) Mexican wave. D) Radio wave. Show Answer Correct Answer: A) Sound wave. 36. The speed of sound through pure water at 0 $^\circ$C is 1, 400 m/s. A sound wave travelling through this medium has a wavelength of 3.18 m. Calculate the frequency of the wave. A) ~ 0.0023 Hz. B) 220 Hz. C) 4, 452 Hz. D) ~ 440 Hz. Show Answer Correct Answer: D) ~ 440 Hz. 37. Waves bouncing off a barrier. A) Medium. B) Reflection. C) Longitudinal. D) Pitch. Show Answer Correct Answer: B) Reflection. 38. Constructive interference happens when two waves are: A) Out of phase. B) Zero amplitude. C) In phase. D) None of the above. Show Answer Correct Answer: C) In phase. 39. In yellow light a green book will look ..... A) White. B) Green. C) Black. D) Yellow. Show Answer Correct Answer: B) Green. 40. How does the speed of sound compare to the speed of light? A) The speed of sound is faster than the speed of light. B) The speed of sound is significantly faster than light. C) The speed of light is much faster than the speed of sound. D) Both speeds are equal in a vacuum. Show Answer Correct Answer: C) The speed of light is much faster than the speed of sound. 41. What would happen to the wavelength if the frequency was doubled? A) The wavelength would be doubled. B) Frequency does not affect wavelength. C) The wavelength would stay the same. D) The wavelength would be halved. Show Answer Correct Answer: D) The wavelength would be halved. 42. Which wave type does the medium move perpendicular (up/down) as the wave moves through it from left to right? A) Compressional wave. B) Transverse wave. C) Electromagnetic wave. D) None of the above. Show Answer Correct Answer: B) Transverse wave. 43. What is the shape of a wave? A) A wave shape with peaks and troughs. B) A circle. C) A straight line. D) A triangle. Show Answer Correct Answer: A) A wave shape with peaks and troughs. 44. What does "opaque" mean when referring to materials? A) Allows light to pass through clearly. B) Allows partial light to pass through. C) Does not allow light to pass through. D) Only reflects light without absorption. Show Answer Correct Answer: C) Does not allow light to pass through. 45. Explain the concept of emissivity in relation to black body radiation. A) Emissivity is the measure of how efficiently an object reflects thermal radiation. B) Emissivity is the measure of how efficiently an object emits thermal radiation compared to a perfect black body. C) Emissivity is the measure of how efficiently an object absorbs thermal radiation. D) Emissivity is the measure of how efficiently an object conducts thermal radiation. Show Answer Correct Answer: B) Emissivity is the measure of how efficiently an object emits thermal radiation compared to a perfect black body. 46. What is the difference between transverse and longitudinal waves? A) Transverse waves move perpendicular to wave direction; longitudinal waves move parallel. B) Transverse waves move parallel to wave direction; longitudinal waves move perpendicular. C) Both transverse and longitudinal waves move in the same direction. D) Transverse waves are sound waves; longitudinal waves are light waves. Show Answer Correct Answer: A) Transverse waves move perpendicular to wave direction; longitudinal waves move parallel. 47. In a longitudinal wave, the particles move ..... ? A) Back and forth. B) Up and down. C) Vertically. D) In the direction of the hertz. Show Answer Correct Answer: A) Back and forth. 48. What happens when a wave passes from one medium to another at an angle? A) Refraction. B) Reflection. C) Absorption. D) Diffraction. Show Answer Correct Answer: A) Refraction. 49. What is the speed of a wave that has a wavelength of 2 and a frequency of 2.5? A) 6 m/s. B) 2.5 m/s. C) 5 m/s. D) 4.5 m/s. Show Answer Correct Answer: C) 5 m/s. 50. The number of waves that pass by a given point per second is known as a wave's ..... A) Peak. B) Frequency. C) Wavelength. D) Amplitude. Show Answer Correct Answer: B) Frequency. 51. What is the frequency of a wave that takes 15 seconds to pass a point? A) 1.5 Hz. B) 0.015Hz. C) 0.15 Hz. D) Don't know/Can't remember. E) 15 Hz. Show Answer Correct Answer: C) 0.15 Hz. 52. Are X-ray waves part of the EM spectrum? A) YES. B) NO. C) All the above. D) None of the above. Show Answer Correct Answer: A) YES. 53. What is the primary factor that determines the speed of a wave in a given medium? A) The type of medium. B) The frequency of the wave. C) The amplitude of the wave. D) The wavelength of the wave. Show Answer Correct Answer: A) The type of medium. 54. Ships have been damaged by water waves with large amplitudes-These waves could have been formed by adding the displacements of smaller waves-Which term describes this phenomenon A) Diffraction. B) Superposition. C) Refraction. D) Polarisation. Show Answer Correct Answer: B) Superposition. 55. The distance between the center of a wave and its maximum height is called the: A) Medium. B) Wavelength. C) Amplitude. D) Antinode. Show Answer Correct Answer: C) Amplitude. 56. Which type of electromagnetic wave has the longest wavelength? A) Visible light. B) Radio waves. C) Ultraviolet. D) Gamma rays. Show Answer Correct Answer: B) Radio waves. 57. Which type of wave is an ocean wave? A) Electromagnetic. B) Mechanical. C) All the above. D) None of the above. Show Answer Correct Answer: B) Mechanical. 58. It is the region of longitudinal wave where the particles of the medium are closest together. A) Compression. B) Combustion. C) Combination. D) Rarefaction. Show Answer Correct Answer: A) Compression. 59. The speed of sound in air depends on the ..... of the air. A) Amplitude. B) Temperature. C) Frequency. D) Wavelength. Show Answer Correct Answer: B) Temperature. 60. As a wave enters a new medium, there may be a change in the wave's A) Speed. B) Frequency. C) Phase. D) Period. Show Answer Correct Answer: A) Speed. ← 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