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Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 5 (60 MCQs)

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1. What quality determines the different names assigned to the various sections of the electromagnetic spectrum?
2. Visible light passes through water. Other types of electromagnetic radiation are able to pass through other materials. Which of the following are used in medical technology because they can pass through certain parts of the human body?
3. A wave is a disturbance that transfers ..... from one place to another.
4. EM waves used to broadcast television signals
5. When using scientific notation, a negative exponent means .....
6. Is the following sentence true or false? All electromagnetic waves travel at the same speed through a vacuum.
7. Electromagnetic waves with the lowest frequency and least amount of energy are .....
8. Produced by nuclear reactions
9. Long distance radio communication. Local radio and TV broadcasting. These are the application of
10. One of Maxwell's starting points wasA varying magnetic field:
11. What are Em waves generated by?
12. Which of the following is an example of non-ionizing radiation?
13. Infrared waves are can be seen by the human eyes.
14. Wavelength is a characteristic that defines ..... , irrespective of its source.
15. The source of all electromagnetic waves is charge that is changing speed or direction.
16. Our skin color depends on the amount of pigment called ..... in our cells to protect us from the Sun's harmful rays.
17. Transverse waves move ..... to motion of medium particles?
18. A radiation comes from electromagnetic waves with sufficiently high energy that can possibly cause cellular and DNA damage
19. This part of the spectrum can be further divided into different subsections, each representative of a particular color, commonly known as the colors of a rainbow, ROYGBV.
20. The wavelengths become shorter as the temperature of the material increases.
21. X-rays are used in medical applications to produce images of bones, tissues, and organs. X-rays are capable of penetrating tissues such as skin, but are less capable of penetrating bone. This property of X-rays derives from which characteristic of the rays?
22. Electromagnetic waves transfer energy from the source of the waves to an absorber.
23. What electromagnetic wave radiated by plants and animals as heat waves?
24. What could be the waves that have shorter wavelengths and higher frequencies than microwaves?
25. Abigail, Maya, and Hannah are on a science adventure! They come across a mysterious box that emits electromagnetic waves. These waves have shorter wavelengths and higher frequencies than microwaves. What could these waves be?
26. Visible light occupies the range of wavelengths from 380 to 790 nanometers in the electromagnetic spectrum. Which of the following kinds of electromagnetic radiation has shorter wavelength than visible light?
27. What electromagnetic wave that can accelerate the aging process of the skin?
28. Which form of electromagnetic radiation is more energetic than ultraviolet rays?
29. Electromagnetic waves show phenomena of reflection, refraction, diffraction and interference under suitable conditions.
30. What is the correct formula for wave speed?
31. What happens to the energy of electromagnetic waves as their wavelengths get shorter?
32. Which of these is the least energetic form of electromagnetic radiation?
33. The source of all electromagnetic waves is oscillating electrons.
34. What do radio and television transmitters emit?
35. Which electromagnetic waves are used for sterilizing medical equipment?
36. Does the sizes of waves in the electromagnetic spectrum vary?
37. Electromagnetic wave with a wavelength less than about 100 trillionths of a meter; usually emitted from a decaying atomic nucleus
38. As wavelength decreases, the crests of the wave:
39. Blue light has a higher frequency than red light. Photons of blue light have ..... energy than photons of red light.
40. Florida's nickname is "The Sunshine State" . Which type of electromagnetic waves can be harmful to Floridians who spend time outside in the sunshine?
41. Waves created by vibrating electric charges; consists of vibrating electric and magnetic fields, and can travel through a vacuum or through matter
42. An electrical signal whose value changes smoothly over time
43. EM waves used to treat some forms of cancer
44. It is used by remote controls used in TV's, video, cassette, recorders, and other electronic appliances.
45. What type of radiation is visible to the human eye?
46. Maxwell concluded that visible light and all other electromagnetic waves consist of fluctuating electric and magnetic fields, with each varying field inducing the other.
47. Microwaves are used in all of the following EXCEPT in .....
48. EM waves usually travel slowest in solids and fastest in gases.
49. When observing waves at the beach, unlike the up and down motion of a cork floating on the water (a longitudinal wave), the disturbance in a wave hitting the shore (a transverse wave) is
50. ..... IS A TRANSVERSE WAVE THAT INVOLVES THE TRANSFER OF ELECTRIC AND MAGNETIC ENERGY. IT IS MADE UP OF VIBRATING ELECTRIC AND MAGNETIC FIELDS THAT MOVE THROUGH SPACE OR SOME MEDIUM AT THE SPEED OF LIGHT.
51. Who formulated the principle behind electromagnetic induction?
52. Ethan, Anika, and Avery are on a space adventure! They come across a mysterious cosmic ray. They know it's not as short as X-rays but also not as long as visible light. Can you help them identify this type of electromagnetic wave?
53. The full range of frequencies of electromagnetic radiation is called
54. Waves are carriers of energy. Which is NOT TRUE about waves?
55. As wavelength increases, frequency decreases, with frequency decreasing, energy increases.
56. Electromagnetic waves can transfer energy without a medium.
57. Which property spells the difference between radio wave and microwave radiation?
58. During an earthquake, which is true about the seismic waves that travel along Earth's surface?
59. It is used in checking signature on passbook
60. This is when light changes direction slightly when it passes from one material to another.
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