This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 55 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 55 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Compressions and rarefactions are characteristic of: A) Transverse waves. B) Longitudinal waves. C) Electromagnetic waves. D) Standing waves. Show Answer Correct Answer: B) Longitudinal waves. 2. Which of the following statements provide a reason why the diffraction of light is NOT usually observed? A) It's wavelength is too small. B) It's frequency is too high. C) It's speed is too high. D) It's wavelength is too large. Show Answer Correct Answer: A) It's wavelength is too small. 3. EM waves used in checking the authenticity of bank notes A) Microwave. B) Infrared. C) Ultraviolet. D) X-ray. Show Answer Correct Answer: C) Ultraviolet. 4. How does the tension in a string affect the speed of a standing wave? A) The tension in a string has no impact on the speed of a standing wave. B) Increasing tension decreases the speed of a standing wave. C) Decreasing tension increases the speed of a standing wave. D) The tension in a string affects the speed of a standing wave by directly influencing the wave speed. Show Answer Correct Answer: D) The tension in a string affects the speed of a standing wave by directly influencing the wave speed. 5. A wave has a frequency of 8 Hz and a wavelength of 4 meters. What is the speed of the wave? A) 32 m/sec. B) 2 m/sec. C) 0.5 m/sec. D) 12 m/sec. Show Answer Correct Answer: A) 32 m/sec. 6. What does the refractive index indicate? A) The amplitude of the wave. B) The frequency of the wave. C) How much a wave slows down in a medium. D) The speed of light in vacuum. Show Answer Correct Answer: C) How much a wave slows down in a medium. 7. What happens to the pitch of a sound as the source moves towards you? A) The pitch of the sound increases. B) The pitch of the sound remains the same. C) The pitch of the sound decreases. D) The pitch of the sound becomes silent. Show Answer Correct Answer: A) The pitch of the sound increases. 8. Waves can carry both energy and matter A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 9. Which of these has the longest wavelength? A) Microwave. B) Ultraviolet. C) Visible light. D) Infrared. Show Answer Correct Answer: A) Microwave. 10. Which statement correctly compares radio waves and X-rays? A) Radio waves have a longer wavelength and a greater speed in a vacuum. B) Radio waves have a longer wavelength and the same speed in a vacuum. C) Radio waves have a shorter wavelength and a greater speed in a vacuum. D) Radio waves have a shorter wavelength and the same speed in a vacuum. Show Answer Correct Answer: B) Radio waves have a longer wavelength and the same speed in a vacuum. 11. What is wave refraction? A) The amplification of waves as they travel through a medium. B) The bending of waves as they pass from one medium to another due to a change in their speed. C) The reflection of waves off a surface. D) The absorption of waves by a medium. Show Answer Correct Answer: B) The bending of waves as they pass from one medium to another due to a change in their speed. 12. Which wave has the highest energy of those listed? A) Radio. B) Uv. C) Infrared. D) Visible light. Show Answer Correct Answer: B) Uv. 13. The medium vibrates perpendicular to the direction the wave travels in a ..... A) Parade wave. B) Standing wave. C) Compressional wave. D) Transverse wave. Show Answer Correct Answer: D) Transverse wave. 14. What is the frequency (in waves per second) of a wave that has 15 waves pass a point in 30 seconds? A) .5 waves/second. B) 2 waves/second. C) 150 waves/second. D) 450 waves/second. Show Answer Correct Answer: A) .5 waves/second. 15. What is the unit of wavelength? A) Hertz. B) Metre. C) Newton. D) Joule. Show Answer Correct Answer: B) Metre. 16. Radio waves and ..... are used in communication A) Microwaves. B) Gamma rays. C) Visible light. D) Ultraviolet. Show Answer Correct Answer: A) Microwaves. 17. What happens to a wave as you increase the period from 1 second to 7 seconds? A) The wave speed will decrease. B) The wave speed will increase. C) The wavelength will become shorter. D) The frequency would decrease. Show Answer Correct Answer: D) The frequency would decrease. 18. What part of the electromagnetic spectrum can be seen by humans? A) Visible light. B) Microwaves. C) Ultraviolet. D) Infrared. Show Answer Correct Answer: A) Visible light. 19. When light enters a denser medium, what happens to its speed? A) It decreases. B) It increases. C) It remains the same. D) It fluctuates. Show Answer Correct Answer: A) It decreases. 20. How does the frequency of a standing wave change when the tension in the string is increased? A) The frequency of the standing wave remains constant. B) The frequency of the standing wave becomes negative. C) The frequency of the standing wave decreases. D) The frequency of the standing wave increases. Show Answer Correct Answer: D) The frequency of the standing wave increases. 21. What is the speed of electromagnetic waves in a vacuum? A) 299, 792, 458 meters per second. B) 150, 000, 000 meters per second. C) 1, 000, 000 meters per second. D) 300, 000, 000 meters per second. Show Answer Correct Answer: A) 299, 792, 458 meters per second. 22. What happens to the wavelength of a wave if its frequency is halved, assuming the speed remains constant? A) It doubles. B) It halves. C) It remains the same. D) It quadruples. Show Answer Correct Answer: A) It doubles. 23. Mechanical waves usually travel fastest through: A) Solids. B) Liquids. C) Gases. D) None of the above. Show Answer Correct Answer: A) Solids. 24. What is the combination of two waves at the same location called? A) Reflection. B) Interference. C) Refraction. D) Superposition. Show Answer Correct Answer: D) Superposition. 25. If a seagull sitting in water bobs up and down once every 2 seconds and the distance between two crests of the water wave is 3 m, what is the velocity of the wave (in m/s)? A) $1.5$. B) 1.5 Mathematical EquivalenceON. C) All the above. D) None of the above. Show Answer Correct Answer: A) $1.5$. ← PreviousNext →Related QuizzesClass 11 Physics (Part Ii) Chapter 17 Waves Quiz 1Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 2Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 3Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 4Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 5Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 6Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 7Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 8Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 9Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books