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Class 12 Physics: Electromagnetic Waves
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Avg score: 22% • Most missed: “Identify the electromagnetic wave which is also known as heatwaves.”

MCQs on electromagnetic waves and spectrum.

Class 12 Physics: Electromagnetic Waves
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18 Questions

1. Which among the following is an application of microwaves?
2. Monica wanted to take photographs of a monument. But since the surrounding is filled with smoke, she is not able to take good photos. Which one of the following electromagnetic waves can be used in this situation to help Monica?
3. Which basic oscillatory circuit is used these days to produce electromagnetic waves?
4. Electromagnetic radiation has an energy of 15 keV. Then this radiation belongs to which region of electromagnetic waves?
5. What is the ratio of the speed of infrared and ultraviolet rays in a vacuum?
6. Is the ratio of frequencies of UV rays and IR rays in the glass more than, less than or equal to 1?
7. Which among the following has a frequency range of 500 kHz to 1000 MHz?
8. What is the full form of UHF?
9. What is the velocity of electromagnetic wave in free space?
10. Identify the electromagnetic wave which is also known as heatwaves.
11. Pick out the electromagnetic wave which is highly harmful to humans.
12. A radio can tune to any station in the frequency range from 2.5 MHz to 15 MHz bands. What is the corresponding wavelength band?
13. The speeds of microwaves, infrared waves, and ultraviolet waves are Vm, Vi, and Vu respectively. Identify the correct combination showing the different waves in vacuum.
14. For which frequency of light, the human eye is most sensitive?
15. Pick out the correct increasing order of energy of electromagnetic waves from the following.
16. Which is the frequency range of gamma rays from the following?
17. On what basis is the classification of electromagnetic waves done?
18. What is the time period of visible light for which human eye is most sensitive?

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