This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves – Quiz 21 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 21 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. All Em waves transfer energy. What does frequency mean in terms of energy? A) The lower the frequency the more energy and vice versa. B) The higher the frequency the less energy and vice versa. C) The higher the frequency the more energy and vice versa. D) It has nothing to do with it it just means its more dangerous. Show Answer Correct Answer: C) The higher the frequency the more energy and vice versa. 2. EM waves that make an object feel warmer A) Visible light. B) Red light. C) Infrared waves. D) Ultraviolet. Show Answer Correct Answer: C) Infrared waves. 3. AM stands for ..... modulation. A) Altitude. B) Alternating. C) Amplitude. D) None of the above. Show Answer Correct Answer: C) Amplitude. 4. The colors of the visible spectrum, in order from longest to shortest wavelength, are ..... , orange, yellow, green, blue, indigo, and violet. A) Red. B) Black. C) White. D) Pink. Show Answer Correct Answer: A) Red. 5. 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. 6. 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. 7. What happens when a electric charge vibrates? What does the electric field do? A) Move. B) Stay the same. C) Reflect. D) Change. Show Answer Correct Answer: D) Change. 8. What electromagnetic wave generates Vitamin D production in the skin? A) Gamma rays. B) Visible light. C) Ultraviolet rays. D) Radiowave. Show Answer Correct Answer: C) Ultraviolet rays. 9. He theorized that changing magnetic field will produce electric field. A) Faraday. B) Hertz. C) Maxwell. D) Oersted. Show Answer Correct Answer: A) Faraday. 10. Light waves are a special type of wave called an ..... A) Electromagnetic wave. B) Sound wave. C) Mechanical wave. D) Seismic wave. Show Answer Correct Answer: A) Electromagnetic wave. 11. 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 magical light show. B) An alien communication device. C) The electromagnetic spectrum. D) A space radio. Show Answer Correct Answer: C) The electromagnetic spectrum. 12. 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. 13. Which electromagnetic wave is primarily responsible for causing sunburn? A) Infrared radiation. B) Ultraviolet radiation. C) Visible light. D) Radio waves. Show Answer Correct Answer: B) Ultraviolet radiation. 14. 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. 15. Which of the following is an application of microwaves? A) Medical imaging. B) Cooking food. C) Sterilizing medical equipment. D) Detecting broken bones. Show Answer Correct Answer: B) Cooking food. 16. A substance that a wave travels through is called a(n) A) Solution. B) Medium. C) Matter. D) Element. Show Answer Correct Answer: B) Medium. 17. 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 can only change things by warming them up, so it cannot cause glue to dry. 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 is not a physical thing, so it cannot change physical things like glue. Show Answer Correct Answer: B) Yes. The glue can take in energy from the light, causing it to dry. 18. Which quantum number determines the shape of an atomic orbital in the hydrogen atom? A) Principal quantum number (n). B) Angular momentum quantum number (l). C) Magnetic quantum number (m$_{l}$). D) Spin quantum number (m$_{s}$). Show Answer Correct Answer: B) Angular momentum quantum number (l). 19. 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. 20. 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. 21. What would be the frequency of a blue light with a wavelength of about 4.62 x 10-7 m? A) 4.21 x 1014 Hz. B) 5.30 x 1014 Hz. C) 6.49 x 1014 Hz. D) 7.58 x 1014 Hz. Show Answer Correct Answer: C) 6.49 x 1014 Hz. 22. Radio waves are low frequency EM waves with wavelengths longer than ..... A) 100 mm. B) 10 mm. C) 1 mm. D) 1 m. Show Answer Correct Answer: C) 1 mm. 23. Two water waves combine in phase and build a larger wave. What phenomenon is happening? A) Constructive interference. B) Refraction. C) Reflection. D) Diffraction. Show Answer Correct Answer: A) Constructive interference. 24. 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$^{3}$ m. B) 3.9 x 10$^{13}$ m. C) 3.9 x 10$^{3}$ m. D) 2.3 x 10$^{13}$ m. Show Answer Correct Answer: A) 2.3 x 10$^{3}$ m. 25. The range of electromagnetic waves placed in a certain order is called the A) Electromagnetic spectrum. B) Electromagnetic wavelength. C) Electromagnetic frequency. D) Electromagnetic field. Show Answer Correct Answer: A) Electromagnetic spectrum. ← PreviousNext →Related 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 8Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 9Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books