This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Physics Part I > Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 15 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Radios, laptops, and radar are examples of devices that function by using electromagnetic waves. What property of electromagnetic waves make them useful for radios, laptops, and radar signals? A) Electromagnetic waves travel at different speeds. B) Electromagnetic waves must travel through a medium. C) Electromagnetic waves are harmful at high frequencies. D) Electromagnetic waves can travel across long distances. Show Answer Correct Answer: D) Electromagnetic waves can travel across long distances. 2. Whether a wave of light is absorbed, transmitted, or reflected depends in large part of the type of ..... (plural of medium) that the light wave hits. A) Frequencies. B) Particles. C) Waves. D) Mediums. Show Answer Correct Answer: D) Mediums. 3. Waves in a lake are 6 m apart and pass a person on a raft every 2 s. What is the speed of the waves? A) 12 m/s. B) 8 m/s. C) 4 m/s. D) 3 m/s. Show Answer Correct Answer: D) 3 m/s. 4. Which electromagnetic waves are used in radar technology? A) Microwaves. B) Ultraviolet waves. C) Gamma rays. D) X-rays. Show Answer Correct Answer: A) Microwaves. 5. What is a common use for radio waves? A) To cook food. B) To transmit data. C) To transmit light. D) To transmit sound only. Show Answer Correct Answer: B) To transmit data. 6. An image that forms where light seems to come from A) Virtual image. B) Regular reflection. C) Diffuse reflection. D) Real image. Show Answer Correct Answer: A) Virtual image. 7. What is the actual time on the clock if it appears to show 4:15? A) 4:45. B) 7:15. C) 7:45. D) 4:15. Show Answer Correct Answer: B) 7:15. 8. Electromagnetic waves do not need a medium because they can transfer energy using electric and magnetic field? A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 9. An ..... is the inner, darker part of a shadow. A) Penumbra. B) Umbra. C) All the above. D) None of the above. Show Answer Correct Answer: B) Umbra. 10. What technology commonly used in navigation relies on microwaves? A) Fiber optics. B) GPS. C) Sonar. D) Infrared sensors. Show Answer Correct Answer: B) GPS. 11. Newton's prism experiments showed that white sunlight is made up of A) The full electromagnetic spectrum. B) Only blue light. C) All the colors of the visible spectrum. D) Only the longest wavelengths. Show Answer Correct Answer: C) All the colors of the visible spectrum. 12. If a galaxy is round and lacks spiral arms, how would you categorize it? A) Elliptical. B) Irregular. C) Spiral. D) Barred spiral. Show Answer Correct Answer: A) Elliptical. 13. Specific frequency that a radio station is assigned and uses to broadcast signals A) Analog signal. B) Digital signal. C) Transceiver. D) Carrier wave. Show Answer Correct Answer: D) Carrier wave. 14. The emission of electrons from a metal caused by light striking the metal is called the ..... effect. A) Piezoelectric. B) Electromagnetic. C) Thermoelectric. D) Photoelectric. Show Answer Correct Answer: D) Photoelectric. 15. What is reflection in simple terms? A) Soaks up light. B) Light passes through. C) Light bounces off. D) None of the above. Show Answer Correct Answer: C) Light bounces off. 16. Each type of wave on the spectrum has ..... A) A different effect and same use. B) A different effect and use. C) The same effect and different use. D) The same effect and the same use. Show Answer Correct Answer: B) A different effect and use. 17. Which of these application is related to gamma ray. A) Baggage scanning at airport. B) Photography. C) Photosynthesis. D) Kills cancer cells in radiotheraphy. Show Answer Correct Answer: D) Kills cancer cells in radiotheraphy. 18. Emma, Samuel, and Elijah are playing a game where they try to identify different types of electromagnetic waves. Which type of electromagnetic wave can they see with their unaided eyes? A) Radio waves. B) Visible light. C) Infrared rays. D) Microwaves. Show Answer Correct Answer: B) Visible light. 19. Which two waves lie at the beginning and end of the electromagnetic spectrum? A) Gamma ray and X-ray. B) Microwave and ultraviolet rays. C) Radio wave and gamma ray. D) Radio waves and microwaves. Show Answer Correct Answer: C) Radio wave and gamma ray. 20. Things that look white ..... all the visible light shining on them. A) Refract. B) Reflect. C) All the above. D) None of the above. Show Answer Correct Answer: B) Reflect. 21. The percentage of light we can see is A) 2%. B) 50 %. C) 0.0035 %. D) 4 %. Show Answer Correct Answer: C) 0.0035 %. 22. Among the types of EM Waves Radio waves have the highest frequency level. A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: B) FALSE. 23. What does the visible light spectrum cover? A) The wavelengths used in radio communication. B) The wavelengths that can be seen by the human eye. C) The wavelengths that cannot be seen by the human eye. D) The wavelengths that are used in X-rays. Show Answer Correct Answer: B) The wavelengths that can be seen by the human eye. 24. What is the name of a sound wave of a certain frequency? A) Volume. B) Range. C) Tone. D) Decibel. Show Answer Correct Answer: C) Tone. 25. Which property determines the amount of energy for an ELECTROMAGNETIC wave? A) Amplitude. B) Frequency. C) Medium. D) Particle size. Show Answer Correct Answer: B) Frequency. 26. Which EM wave is responsible for food production of plants through photosynthesis? A) Visible light. B) Ultraviolet rays. C) X-rays. D) Infrared rays. Show Answer Correct Answer: A) Visible light. 27. Which part of the electromagnetic spectrum is not characterized by causing cancer? A) Radio waves. B) Ultraviolet rays. C) X-rays. D) Gamma rays. Show Answer Correct Answer: A) Radio waves. 28. A method of broadcasting signals by changing frequency A) Modulation. B) Trapezoid. C) Frequency modulation. D) Amplitude modulation. Show Answer Correct Answer: C) Frequency modulation. 29. Can travel through matter (gas, liquid, solid) but not space. A) Light. B) Sound. C) All the above. D) None of the above. Show Answer Correct Answer: B) Sound. 30. Electromagnetic waves produce fields of energy. What are these 2 fields of energy? A) Elephant and Mouse. B) Electrical and Mechanical. C) Radiation and Light. D) Electrical and Magnetic. Show Answer Correct Answer: D) Electrical and Magnetic. 31. Which electromagnetic wave carries the most energy? A) Radio waves. B) Light waves. C) Microwaves. D) Gamma waves. Show Answer Correct Answer: D) Gamma waves. 32. In the electromagnetic spectrum, which has the longest wavelength? A) Radio wave. B) Ultraviolet. C) Gamma ray. D) Visible light. Show Answer Correct Answer: A) Radio wave. 33. All ..... waves need a medium to carry energy. A) Transverse. B) Electromagnetic waves. C) Mechanical waves. D) Longitudinal waves. Show Answer Correct Answer: C) Mechanical waves. 34. How does changing the amplitude affect a light wave? A) It doesn't change anything. B) It changes the the type of wave. C) It changes the intensity. D) It changes the volume. Show Answer Correct Answer: C) It changes the intensity. 35. Which of the following is the correct order for the visible light spectrum starting with the longest wavelength and ending with the shortest? A) Violet, indigo, blue, yellow, orange, red. B) Red, blue, yellow. C) Red, orange, yellow, green, blue, indigo, violet. D) Yellow, orange, red, green, indigo, blue, violet. Show Answer Correct Answer: C) Red, orange, yellow, green, blue, indigo, violet. 36. The vast majority of galaxies in our universe are moving away from us. We know this because we observe ..... in the galaxies absorption spectra. A) Superposition. B) Redshift. C) Blueshift. D) Turbulance. Show Answer Correct Answer: B) Redshift. 37. If you're moving from gamma rays to microwave, describe how the energy level changes A) We never talked about it. B) Increases. C) Energy level doesn't change. D) Decreases. Show Answer Correct Answer: D) Decreases. 38. A change in the amplitude of a carrier wave is called ..... A) Frequency modulation (FM). B) Broadcasting. C) Amplitude modulation (AM). D) Reception. Show Answer Correct Answer: C) Amplitude modulation (AM). 39. Waves that have a higher ..... , have a higher energy. A) Amplitude. B) Frequency. C) Wavelength. D) Magnetism. Show Answer Correct Answer: B) Frequency. 40. Is the statement correct?Photosynthesis is the process that uses electromagnetic waves in the form of light as a source of energy to produce food in plants and photosynthetic organisms. A) YES. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) YES. 41. As an electromagnetic wave travels through free space, its speed can be increased by ..... A) Increasing its frequency. B) Increasing its energy only. C) Increasing both its energy and momentum. D) Nothing will increase its speed. Show Answer Correct Answer: D) Nothing will increase its speed. 42. The velocity of light is least in ..... and highest in ..... light. A) Least in red, highest in violet. B) Least in violet, highest in red. C) All the above. D) None of the above. Show Answer Correct Answer: B) Least in violet, highest in red. 43. Which of the following best describes radio waves? A) Widely used in the cooking industry. B) Used to broadcast television signals. C) Used in tanning beds. D) Used to identify heat signatures of people lost in the wilderness. Show Answer Correct Answer: B) Used to broadcast television signals. 44. Is it possible to exceed the speed of light? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: B) No. 45. Identify the region of the electromagnetic spectrum used for medical imaging. A) Radio waves. B) Ultrasound. C) X-rays. D) Infrared. Show Answer Correct Answer: C) X-rays. 46. Honeybees can see light of shorter wavelengths than humans, but they cannot see red light. What do you think is the kind of radiation that honeybees can see? A) Radio waves. B) Visible light. C) Ultraviolet rays. D) Gamma rays. Show Answer Correct Answer: C) Ultraviolet rays. 47. Which of the following has the shortest wavelength? A) Radiowaves. B) Gamma rays. C) Ultraviolet rays. D) Microwaves. Show Answer Correct Answer: B) Gamma rays. 48. Which of these colors of visible light has the shortest wavelength? A) Yellow. B) Red. C) Violet. D) Green. Show Answer Correct Answer: C) Violet. 49. The stationary wave pattern formed in a medium when two sets of identical waves pass through the medium in opposite directions is a A) Transverse wave. B) Standing wave. C) Walking wave. D) Shifting wave. Show Answer Correct Answer: B) Standing wave. 50. If a wave has a high frequency, it will have ..... energy. A) High. B) Medium. C) Low. D) None of the above. Show Answer Correct Answer: A) High. 51. Frequencies is called the electromagnetic spectrum A) True. B) False. C) Both. D) None of the above. Show Answer Correct Answer: B) False. 52. Which wave on the Electromagnetic spectrum has the lowest frequency and longest wavelength? A) Ultraviolet Waves. B) Gamma Waves. C) Radio Waves. D) X Rays. Show Answer Correct Answer: C) Radio Waves. 53. What is the description for visible light? A) Has the least amount of energy. B) Causes skin to tan. C) Allows you to see. D) Can see broken bones. Show Answer Correct Answer: C) Allows you to see. 54. Waves that require a material to travel though are called A) Electromagnetic waves. B) Mechanical waves. C) Ocean waves. D) Transverse waves. E) I do not know and do not wish to answer. Show Answer Correct Answer: B) Mechanical waves. 55. A system that uses reflective microwaves to detect speed. A) Speed trap. B) Radar. C) X ray. D) Thermogram. Show Answer Correct Answer: B) Radar. 56. ..... is the electromagnetic wave with the longest wavelength. A) Radio wave. B) X-ray. C) Gamma ray. D) Ultraviolet. Show Answer Correct Answer: A) Radio wave. 57. Shortwave radio is broadcast between 3.50 and 29.7 MHz. To what range ofwavelengths does this correspond?c= 3.00 x 10$^{8}$ m/s. $\lambda=\frac{c}{f}$ A) 84 m / 10.1 m. B) 85.7 m / 10.1 m. C) 86 m / 12 m. D) 88 m / 12 m. Show Answer Correct Answer: B) 85.7 m / 10.1 m. 58. Which waves are used to show heat loss with heat sensitive cameras? A) Ultraviolet radiation. B) Infrared radiation. C) Microwaves. D) Gamma rays. Show Answer Correct Answer: B) Infrared radiation. 59. In the spectrum diagram, wavelength decreases from left to right. What happens to frequency as you move from radio waves to gamma rays? A) Frequency decreases to the lowest values. B) Frequency changes randomly without a pattern. C) Frequency increases to higher values. D) Frequency stays the same across the spectrum. Show Answer Correct Answer: C) Frequency increases to higher values. 60. Large wavelength = A) Small frequency. B) Large frequency. C) All the above. D) None of the above. Show Answer Correct Answer: A) Small frequency. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 1Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 2Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 3Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 4Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 5Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 6Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 7Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books