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Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 12 (25 MCQs)

Quiz Instructions

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1. What could be the waves that have shorter wavelengths and higher frequencies than microwaves?
2. 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?
3. 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?
4. What electromagnetic wave that can accelerate the aging process of the skin?
5. Which form of electromagnetic radiation is more energetic than ultraviolet rays?
6. Electromagnetic waves show phenomena of reflection, refraction, diffraction and interference under suitable conditions.
7. Which of the following waves DO NOT require a medium to propagate .....
8. What is the correct formula for wave speed?
9. What happens to the energy of electromagnetic waves as their wavelengths get shorter?
10. Which of these is the least energetic form of electromagnetic radiation?
11. The source of all electromagnetic waves is oscillating electrons.
12. What do radio and television transmitters emit?
13. Which electromagnetic waves are used for sterilizing medical equipment?
14. Does the sizes of waves in the electromagnetic spectrum vary?
15. Electromagnetic wave with a wavelength less than about 100 trillionths of a meter; usually emitted from a decaying atomic nucleus
16. As wavelength decreases, the crests of the wave:
17. Blue light has a higher frequency than red light. Photons of blue light have ..... energy than photons of red light.
18. Florida's nickname is "The Sunshine State" . Which type of electromagnetic waves can be harmful to Floridians who spend time outside in the sunshine?
19. Waves created by vibrating electric charges; consists of vibrating electric and magnetic fields, and can travel through a vacuum or through matter
20. An electrical signal whose value changes smoothly over time
21. EM waves used to treat some forms of cancer
22. It is used by remote controls used in TV's, video, cassette, recorders, and other electronic appliances.
23. What type of radiation is visible to the human eye?
24. Maxwell concluded that visible light and all other electromagnetic waves consist of fluctuating electric and magnetic fields, with each varying field inducing the other.
25. Microwaves are used in all of the following EXCEPT in .....
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