This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 8 Electromagnetic Waves Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Cell phones do not cause cancer because they lack enough A) Momentum. B) Photons. C) Radio Frequency Energy. D) Frequency. Show Answer Correct Answer: C) Radio Frequency Energy. 2. Through which of these mediums does a sound wave travel through the easiest? A) Gas. B) Liquid. C) Solid. D) None of the above. Show Answer Correct Answer: C) Solid. 3. What does a lamp give off? A) Sound. B) Light. C) Nuclear energy. D) None of the above. Show Answer Correct Answer: B) Light. 4. ..... is the use of electromagnetic waves to send information in all directions. A) Carrier wave. B) Broadcasting. C) X-ray. D) Amplitude. Show Answer Correct Answer: B) Broadcasting. 5. How are fiber optics used in communication? A) By using sound waves to transmit data. B) By using light waves to transmit data through glass fibers. C) By using microwaves to transmit data through air. D) By using X-rays to transmit data through metal wires. Show Answer Correct Answer: B) By using light waves to transmit data through glass fibers. 6. Which of the following electromagnetic waves has the lowest energy? A) Gamma ray. B) Infrared wave. C) Visible light wave. D) Microwave. Show Answer Correct Answer: D) Microwave. 7. What word describes the number of waves that pass a certain point in a given amount of time? A) Frequency. B) Amplitude. C) Resonance. D) Wavelength. Show Answer Correct Answer: A) Frequency. 8. Bone fracture can be detected by using ..... A) Gamma rays. B) X-ray. C) Light ray. D) All the above. Show Answer Correct Answer: B) X-ray. 9. Which statement best describes a property or use of gamma rays? A) They have smallest wavelength and highest frequency. B) They are safe for skin and reduce cancer risk. C) They are used to heat food in household ovens. D) They reflect off clouds to create visible rainbows. Show Answer Correct Answer: A) They have smallest wavelength and highest frequency. 10. The range of all forms of radiant energy is called the A) Video spectrum. B) Audio spectrum. C) Color spectrum. D) Electromagnetic spectrum. Show Answer Correct Answer: D) Electromagnetic spectrum. 11. Which type of radio waves has a higher frequency:AM or FM? A) AM. B) FM. C) All the above. D) None of the above. Show Answer Correct Answer: A) AM. 12. What is the type of modulation achieved by varying the frequency of a carrier wave while keeping the amplitude constant? A) Amplitude Modulation (AM). B) Digital Modulation (DM). C) Frequency Modulation (FM). D) Phase Modulation (PM). Show Answer Correct Answer: C) Frequency Modulation (FM). 13. Speed of electromagnetic waves in vacuum is A) 3 x 10$^{8}$ m/s. B) 4 x 10$^{8}$ m/s. C) 2 x 10$^{8}$ m/s. D) None. Show Answer Correct Answer: A) 3 x 10$^{8}$ m/s. 14. An EM wave only travels in one directions. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 15. What is the frequency range of ultraviolet radiation? A) 3.5x109-3x1011 Hz. B) 3.5x1011-3x1014 Hz. C) 7.5x1014-3x1016 Hz. D) 7.5x1016-3x1019 Hz. Show Answer Correct Answer: C) 7.5x1014-3x1016 Hz. 16. Based on Maxwell's starting points*Magnetic fields are generated: A) By moving charges or currents. B) By still charges. C) By chemical reactions. D) By summer and hot weather. Show Answer Correct Answer: A) By moving charges or currents. 17. Given images of three galaxies-one with a disk and arms, one that is round and smooth, and one with no clear shape-how would you categorize each galaxy type? A) Spiral, Elliptical, Irregular. B) Irregular, Spiral, Elliptical. C) Elliptical, Irregular, Spiral. D) Spiral, Irregular, Elliptical. Show Answer Correct Answer: A) Spiral, Elliptical, Irregular. 18. True or false? Warm objects emit radiation, but cool objects do not. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 19. What types of waves can travel through empty space AND mediums? A) Longitudinal. B) Mechanical. C) Electromagnetic. D) None of the above. Show Answer Correct Answer: C) Electromagnetic. 20. Which part of the electromagnetic spectrum is used in night vision goggles? A) Ultraviolet. B) Infrared. C) Visible light. D) Microwave. Show Answer Correct Answer: B) Infrared. 21. A wave is a disturbance that transfers energy. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 22. The magnetic and electric fields ..... A) Create each other only once. B) Create each other again and again. C) All the above. D) None of the above. Show Answer Correct Answer: B) Create each other again and again. 23. When on a flat surface, giving the Slinky$^{\textregistered}$ a push or pulse will create a disturbance A) In the opposite direction of the wave motion. B) Parallel to the wave motion. C) In a circle. D) Perpendicular to the wave motion. Show Answer Correct Answer: B) Parallel to the wave motion. 24. Which of the following occurs as a light wave bends when it passes from on medium to another? A) Constructive interference. B) Refraction. C) Reflection. D) Destructive interference. Show Answer Correct Answer: B) Refraction. 25. Speed of electromagnetic waves is highest in ..... A) Vacuum. B) Air. C) Water. D) Solids. Show Answer Correct Answer: A) Vacuum. ← 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