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 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 9 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The colors of the visible spectrum, in order from longest to shortest wavelength, are ..... , orange, yellow, green, blue, indigo, and violet. A) Pink. B) White. C) Black. D) Red. Show Answer Correct Answer: D) Red. 2. Radio waves are ..... EM waves A) High frequency. B) Low frequency. C) Low and high frequencies. D) Medium frequency. Show Answer Correct Answer: B) Low frequency. 3. What happens as the amplitude of a light wave increases? A) The light appears dimmer. B) The light appears more red. C) The light appears brighter. D) None of the above. Show Answer Correct Answer: C) The light appears brighter. 4. What happens when a electric charge vibrates? What does the electric field do? A) Stay the same. B) Reflect. C) Move. D) Change. Show Answer Correct Answer: D) Change. 5. What electromagnetic wave generates Vitamin D production in the skin? A) Radiowave. B) Visible light. C) Gamma rays. D) Ultraviolet rays. Show Answer Correct Answer: D) Ultraviolet rays. 6. He theorized that changing magnetic field will produce electric field. A) Faraday. B) Maxwell. C) Oersted. D) Hertz. Show Answer Correct Answer: A) Faraday. 7. Light waves are a special type of wave called an ..... A) Sound wave. B) Mechanical wave. C) Electromagnetic wave. D) Seismic wave. Show Answer Correct Answer: C) Electromagnetic wave. 8. Sophia, Anika, and Noah are on a space adventure! They come across a strange device that shows the complete range of electromagnetic waves placed in order of increasing frequency. What do they call this? A) A space radio. B) A magical light show. C) The electromagnetic spectrum. D) An alien communication device. Show Answer Correct Answer: C) The electromagnetic spectrum. 9. What are the 3 primary colors of LIGHT? A) Red, green, blue. B) Cyan, magenta, yellow. C) Red, blue, yellow. D) None of the above. Show Answer Correct Answer: A) Red, green, blue. 10. Which electromagnetic wave is primarily responsible for causing sunburn? A) Infrared radiation. B) Ultraviolet radiation. C) Radio waves. D) Visible light. Show Answer Correct Answer: B) Ultraviolet radiation. 11. Which colors in the visible light are the easiest to see so many poisonous animals use them as warnings? A) Blue, indigo, violet. B) Yellow, red, orange. C) Black, white, and brown. D) Red, green, violet. Show Answer Correct Answer: B) Yellow, red, orange. 12. Which of the following is an application of microwaves? A) Cooking food. B) Medical imaging. C) Sterilizing medical equipment. D) Detecting broken bones. Show Answer Correct Answer: A) Cooking food. 13. A substance that a wave travels through is called a(n) A) Medium. B) Solution. C) Element. D) Matter. Show Answer Correct Answer: A) Medium. 14. Your friend says that there is a kind of glue that only dries when it is exposed to a special type of light. Can light cause glue to dry? A) No. Light is not a physical thing, so it cannot change physical things like glue. B) Yes. The glue can take in energy from the light, causing it to dry. C) Yes. Light can pull energy out of the glue, causing it to dry. D) No. Light can only change things by warming them up, so it cannot cause glue to dry. Show Answer Correct Answer: B) Yes. The glue can take in energy from the light, causing it to dry. 15. Which quantum number determines the shape of an atomic orbital in the hydrogen atom? A) Angular momentum quantum number (l). B) Magnetic quantum number (m$_{l}$). C) Spin quantum number (m$_{s}$). D) Principal quantum number (n). Show Answer Correct Answer: A) Angular momentum quantum number (l). 16. Which among the electromagnetic waves are emitted by hot objects? A) Infrared rays. B) Microwaves. C) Radio waves. D) X-rays. Show Answer Correct Answer: A) Infrared rays. 17. Different Em waves have different properties which can affect human health. What are the effects of Ultraviolet? A) UV is absorbed by skin and has a higher frequency so its more dangerous. Its a type of ionising radiation so it damages the cells on the surface of the skin causing skin cancer. B) UV are transmitted through the body without being absorbed. C) All the above. D) None of the above. Show Answer Correct Answer: A) UV is absorbed by skin and has a higher frequency so its more dangerous. Its a type of ionising radiation so it damages the cells on the surface of the skin causing skin cancer. 18. What would be the frequency of a blue light with a wavelength of about 4.62 x 10-7 m? A) 6.49 x 1014 Hz. B) 7.58 x 1014 Hz. C) 5.30 x 1014 Hz. D) 4.21 x 1014 Hz. Show Answer Correct Answer: A) 6.49 x 1014 Hz. 19. Radio waves are low frequency EM waves with wavelengths longer than ..... A) 10 mm. B) 1 mm. C) 100 mm. D) 1 m. Show Answer Correct Answer: B) 1 mm. 20. Two water waves combine in phase and build a larger wave. What phenomenon is happening? A) Diffraction. B) Constructive interference. C) Reflection. D) Refraction. Show Answer Correct Answer: B) Constructive interference. 21. An electromagnetic wave in a vacuum has a frequency of 1.3 x 10$^{5}$ Hz, what is it's wavelength in meters? A) 2.3 x 10$^{13}$ m. B) 3.9 x 10$^{3}$ m. C) 3.9 x 10$^{13}$ m. D) 2.3 x 10$^{3}$ m. Show Answer Correct Answer: D) 2.3 x 10$^{3}$ m. 22. The range of electromagnetic waves placed in a certain order is called the A) Electromagnetic spectrum. B) Electromagnetic wavelength. C) Electromagnetic field. D) Electromagnetic frequency. Show Answer Correct Answer: A) Electromagnetic spectrum. 23. Which color reflects the most light? A) Black. B) White. C) Yellow. D) None of the above. Show Answer Correct Answer: B) White. 24. Which of the following best describes ultraviolet light? A) Used to broadcast television signals. B) Used by medical professionals to "see" inside the body. C) Used in tanning beds. D) Widely used in the cooking industry. Show Answer Correct Answer: C) Used in tanning beds. 25. Which electromagnetic waves are used in medical imaging to view soft tissues? A) MRI. B) Radio waves. C) Ultrasound. D) X-rays. Show Answer Correct Answer: A) MRI. 26. The distance between two crests or two troughs of a wave is called: A) Frequency. B) Amplitud. C) Wavelength. D) Hertz. Show Answer Correct Answer: C) Wavelength. 27. Cell phones and satellites use ..... between 1 cm & 20 cm for communication. A) Microwaves. B) Car waves. C) All the above. D) None of the above. Show Answer Correct Answer: A) Microwaves. 28. ..... is relatively low energy radiation that does not have enough energy to ionize atoms or molecules. They are located at the low end of the electromagnetic spectrum. A) Non-ionizing radiation. B) Ionizing radiation. C) X-rays. D) Gamma rays. Show Answer Correct Answer: A) Non-ionizing radiation. 29. A sound wave and a light wave can bounce back off an object, what is this called? A) Refracting. B) Reflecting. C) Frequency. D) None of the above. Show Answer Correct Answer: B) Reflecting. 30. Electromagnetic waves are unique due to their ability to do which of the following? A) Travel through space. B) ONLY travel in space. C) Both 1 and 2. D) None of these. Show Answer Correct Answer: A) Travel through space. 31. In a vacuum, as the wavelengths of electromagnetic waves increase, the frequencies A) Decrease. B) Increase. C) Remain constant. D) None of the above. Show Answer Correct Answer: A) Decrease. 32. Electromagnetic waves are commonly referred to as? A) Light. B) Matter. C) Sound. D) Space. Show Answer Correct Answer: A) Light. 33. Which of the following best describes the nature of electromagnetic waves? A) They require a medium to travel through. B) They are longitudinal waves. C) They consist of oscillating electric and magnetic fields. D) They can only travel through solid materials. Show Answer Correct Answer: C) They consist of oscillating electric and magnetic fields. 34. Rhythmic disturbances that carry energy are called ..... A) Waves. B) Bubbles. C) Ripples. D) Pulsars. Show Answer Correct Answer: A) Waves. 35. These are Electromagnetic waves characteristic except A) Moves with speed of light. B) Transverse wave. C) Do not need medium for propagation. D) Longitudinal wave. Show Answer Correct Answer: D) Longitudinal wave. 36. Optical fibers used in communication carry information in the form of ..... A) Visible light. B) Microwaves. C) Infrared. D) Radio waves. Show Answer Correct Answer: A) Visible light. 37. Which of the following lists the visible spectrum in order of decreasing frequency? A) Yellow orange, violet. B) Yellow, blue, violet. C) Yellow, orange, red. D) Yellow, green, white. Show Answer Correct Answer: C) Yellow, orange, red. 38. ..... have the highest energy and shortest wavelength of all electromagnetic waves. A) X Ray. B) Radio. C) Gamma. D) Microwaves. Show Answer Correct Answer: C) Gamma. 39. THE ENERGY THAT ELECTROMAGNETIC WAVES TRANSFER THROUGH MATTER OR SPACE IS CALLED ..... A) PHOTOELECTRICITY. B) POLARIZED LIGHT. C) ELECTROMAGNETIC RADIATION. D) ELECTROMAGNETIC SPECTRUM. Show Answer Correct Answer: C) ELECTROMAGNETIC RADIATION. 40. Which electromagnetic wave can travel the least distances because it has a wavelength range of less than 1x10-11 meters but has the highest energy? A) Radio wave. B) Microwave. C) X-ray. D) Gamma ray. Show Answer Correct Answer: D) Gamma ray. 41. Which type of wave requires a medium? A) Sound waves. B) Light waves. C) Electromagnetic waves. D) None of the above. Show Answer Correct Answer: A) Sound waves. 42. Explain how electromagnetic waves are generated by charged particles. A) Electromagnetic waves are created when charged particles collide with each other. B) Electromagnetic waves are produced only by static charged particles. C) Charged particles generate electromagnetic waves by emitting sound waves. D) Electromagnetic waves are generated by the acceleration of charged particles, creating changing electric and magnetic fields that propagate through space. Show Answer Correct Answer: D) Electromagnetic waves are generated by the acceleration of charged particles, creating changing electric and magnetic fields that propagate through space. 43. Radio Broadcasting is modulated with the help of various modulation techniques such as (AM) and (FM). A) TRUE. B) FALSE. C) All the above. D) None of the above. Show Answer Correct Answer: A) TRUE. 44. Different Em waves have different properties which can affect human health. What are the effects of Infrared and Visible light? A) They are mostly reflected or absorbed by skin causing heating, Infrared can cause burns if the skin gets too hot. B) They are ionising so they can cause mutations and damage cells which can lead to cancer, they can also be absorbed by deeper tissue. C) All the above. D) None of the above. Show Answer Correct Answer: A) They are mostly reflected or absorbed by skin causing heating, Infrared can cause burns if the skin gets too hot. 45. Which part of the electromagnetic spectrum is responsible for the greenhouse effect on Earth? A) Gamma rays. B) Infrared rays. C) Ultraviolet rays. D) X-rays. Show Answer Correct Answer: B) Infrared rays. 46. What phenomenon explains the bending of light as it passes through different mediums? A) Refraction. B) Diffraction. C) Reflection. D) Absorption. Show Answer Correct Answer: A) Refraction. 47. A microwave oven emits radiation at a wavelength of 0.050 m. What is the frequency of this radiation? (Hint:Use the speed of light.) A) 1.50 x 10$^{6}$ Hz. B) 6.67 x 10$^{7}$ Hz. C) 6.00 x 10$^{9}$ Hz. D) 2.00 Hz. Show Answer Correct Answer: C) 6.00 x 10$^{9}$ Hz. 48. A light wave spreads out in all directions from the source. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 49. When stargazing the stars appear to move from ..... A) North to west. B) West to east. C) South to west. D) East to west. Show Answer Correct Answer: D) East to west. 50. What does GPS stand for? A) Geology Passage System. B) Graphic Photo System. C) Geographical Place System. D) Global Positioning System. Show Answer Correct Answer: D) Global Positioning System. 51. Sound waves are NOT ..... A) Compression. B) Electromagnetic Waves. C) Mechanical Waves. D) Waves. Show Answer Correct Answer: B) Electromagnetic Waves. 52. What is the primary difference between electromagnetic waves and mechanical waves? A) Mechanical waves can travel through a vacuum. B) Mechanical waves have higher frequencies than electromagnetic waves. C) Electromagnetic waves can travel through a vacuum. D) Electromagnetic waves require a medium to travel. Show Answer Correct Answer: C) Electromagnetic waves can travel through a vacuum. 53. Two light waves have the same amplitude. The wave with the higher frequency carries ..... energy. A) Less. B) More. C) The same amount of. D) None of the above. Show Answer Correct Answer: B) More. 54. Which of the following waves are used in radio and television ..... A) Radio waves. B) Infrared light. C) X-rays. D) Micro waves. Show Answer Correct Answer: A) Radio waves. 55. This is the term that describes when light passes through matter. A) Transmission. B) Opaque. C) Transparent. D) Translucent. Show Answer Correct Answer: A) Transmission. 56. It has a long wavelength which can penetrate the flesh but not the bones. A) Radio waves. B) X-rays. C) Visible light. D) Gamma Rays. Show Answer Correct Answer: B) X-rays. 57. Intensity is the ..... at which a wave's energy flows through a given unit of area. A) Amplitude. B) Speed. C) Frequency. D) Rate. Show Answer Correct Answer: D) Rate. 58. What is wavelength measured in per second? A) Inches. B) Crest to crest. C) Hertz. D) Lanta. Show Answer Correct Answer: C) Hertz. 59. Which of the following best describes the propagation of electromagnetic waves? A) They can only propagate in a vacuum. B) They can propagate in both a vacuum and a medium. C) They can only propagate in a medium. D) They cannot propagate in a vacuum. Show Answer Correct Answer: B) They can propagate in both a vacuum and a medium. 60. Which color of visible light has the lowest frequency? A) Green. B) Blue. C) Violet. D) Red. Show Answer Correct Answer: D) Red. ← 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