This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves – Quiz 35 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 35 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What type of wave has the largest wavelength and the lowest frequency on the electromagnetic spectrum? A) Radio. B) Micro. C) Gamma. D) X ray. Show Answer Correct Answer: A) Radio. 2. Energy can be transferred from one medium to another through ..... A) Vibrations. B) Stacking objects. C) An ordered sequence. D) Colors. Show Answer Correct Answer: A) Vibrations. 3. How much of the electromagnetic spectrum is visible? A) All of it. B) None of it. C) Most of it. D) Only a small part. Show Answer Correct Answer: D) Only a small part. 4. A student is measuring the distance between the crest and the rest position of both a mechanical wave in a spring and an electromagnetic wave emitted by a radio antenna. Which question is the student trying to answer? A) What is the speed of the waves?. B) What is the amplitude of the waves?. C) What is the wavelength of the waves?. D) What is the frequency of the waves?. Show Answer Correct Answer: B) What is the amplitude of the waves?. 5. Which of the following are not a part of the Electromagnetic Spectrum? A) Gamma Rays. B) Radio waves. C) Magnetic waves. D) X-rays. Show Answer Correct Answer: C) Magnetic waves. 6. Constellations are important reference points for locating A) Planets. B) Comets. C) Stars. D) All of the above. Show Answer Correct Answer: D) All of the above. 7. The wave speed equation is v = frequency x wavelength. If the frequency of a wave is 500Hz and the wavelength is 2m, how fast is the wave moving? A) 25 m/s. B) 250 m/s. C) 1000 m/s. D) 10, 000 m/s. Show Answer Correct Answer: C) 1000 m/s. 8. What is bending of a light wave is called? A) Reflection. B) Refraction. C) Echo. D) None of the above. Show Answer Correct Answer: B) Refraction. 9. This wave has the second highest frequency on the spectrum. A) X-rays. B) Microwaves. C) Gamma rays. D) Visible light. Show Answer Correct Answer: A) X-rays. 10. To refract means A) To bounce off of. B) To bend. C) All the above. D) None of the above. Show Answer Correct Answer: B) To bend. 11. When the wavelength increases the frequency will A) Increase. B) Decrease. C) Remain same. D) None of these. Show Answer Correct Answer: B) Decrease. 12. Ultraviolet sterilization is effective because UV light: A) Heats objects to high temperatures, killing bacteria. B) Can be seen by the naked eye, ensuring areas are covered. C) Has short wavelengths that can break molecular bonds in DNA. D) Uses low energy waves that are safe for human exposure. Show Answer Correct Answer: C) Has short wavelengths that can break molecular bonds in DNA. 13. Which of the following EM wave has the longest wavelength? A) Infrared wave. B) Radio wave. C) Visible light. D) X-ray. Show Answer Correct Answer: B) Radio wave. 14. Waves that do NOT require a medium to travel A) Mechanical Wave. B) Electromagnetic Wave. C) Longitudinal Wave. D) Transverse Wave. E) Surface Wave. Show Answer Correct Answer: B) Electromagnetic Wave. 15. What happens to the frequency of an electromagnetic wave if its wavelength is doubled, assuming the speed of light remains constant? A) The frequency is halved. B) The frequency doubles. C) The frequency remains the same. D) The frequency quadruples. Show Answer Correct Answer: A) The frequency is halved. 16. What electromagnetic wave that can induce cancer and genetic defects? A) Microwave. B) Infrared. C) Gamma rays. D) Ultraviolet rays. Show Answer Correct Answer: C) Gamma rays. 17. The following give off ionizing radiation:* radioactive material * very high-voltage equipment * nuclear reactions * stars A) Radioactive material. B) Very high-voltage equipment. C) Nuclear reactions. D) Stars. Show Answer Correct Answer: A) Radioactive material. 18. What happens to the frequency of the electromagnetic wave if its wavelength increases? A) It decreases. B) It increases as well. C) It remains the same. D) It will not increase nor decrease. Show Answer Correct Answer: A) It decreases. 19. As a thunderstorm approaches, you see the lightning before you hear the thunder, because light travels ..... than sound. A) Faster. B) Slower. C) At the same speed. D) In a different medium. Show Answer Correct Answer: A) Faster. 20. Medium and high frequency waves of ..... are used for broadcasting by local radio stations. A) Radio waves. B) Gamma rays. C) Infrared rays. D) X-rays. Show Answer Correct Answer: A) Radio waves. 21. Electromagnetic waves can transfer energy through a vacuum. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 22. True or False:Sound waves can travel where there is no matter. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 23. What is the primary use of infrared waves in everyday technology? A) Cooking food. B) Remote controls. C) Medical imaging. D) Radio broadcasting. Show Answer Correct Answer: B) Remote controls. 24. True or False:Every object gives off electromagnetic waves. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 25. Sunlight is composed of energy that is visible to humans and energy that is not visible to humans. Which statement describes how the visible energy from the Sun is different from the non visible energy? A) It travels at a different speed. B) It travels a different distance. C) It has different wavelengths. D) It has different amplitudes. Show Answer Correct Answer: C) It has different wavelengths. ← 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