This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 57 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 57 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following factors affects the speed of sound? A) Temperature. B) Shape. C) Color. D) Weight. Show Answer Correct Answer: A) Temperature. 2. Which term describes the highest point on a wave? A) Trough. B) Frequency. C) Crest. D) Wavelength. Show Answer Correct Answer: C) Crest. 3. Destructive interference happens when two waves A) Change their speed and bend. B) Meet and make a wave with a smaller amplitude. C) Meet and make a wave with a bigger amplitude. D) Go around a barrier. Show Answer Correct Answer: B) Meet and make a wave with a smaller amplitude. 4. Unit for wave frequency? A) Metre. B) Hertz. C) Mm. D) Kg. Show Answer Correct Answer: B) Hertz. 5. The lowest point on a transverse wave is called the ..... A) Amplitude. B) Base. C) Trough. D) Crest. Show Answer Correct Answer: C) Trough. 6. The spreading of waves as they pass through an opening or around an obstacle is called A) Reflection. B) Refraction. C) Diffraction. D) Interference. Show Answer Correct Answer: C) Diffraction. 7. What causes waves? A) Vibrations. B) Mediums. C) Reflections. D) Whales. Show Answer Correct Answer: A) Vibrations. 8. Explain how a plane mirror reflects light. A) A plane mirror absorbs all light without reflection. B) A plane mirror reflects light by bending it at a 90-degree angle. C) A plane mirror reflects light by following the law of reflection, where the angle of incidence equals the angle of reflection. D) A plane mirror reflects light only when it is illuminated from behind. Show Answer Correct Answer: C) A plane mirror reflects light by following the law of reflection, where the angle of incidence equals the angle of reflection. 9. Waves changing direction at a boundary is called ..... A) Refraction. B) Reflection. C) Absorption. D) Transmission. Show Answer Correct Answer: A) Refraction. 10. Electrons used in an electron microscope areaccelerated by a voltage of 25 kV. If the voltageis increased to 100 kV then the de-Brogliewavelength associated with the electrons would: A) Increase by 2 times. B) Decrease by 2 times. C) Decrease by 4 times. D) Increase by 4 times. Show Answer Correct Answer: B) Decrease by 2 times. 11. A wave that needs a medium to travel is called a(n) A) Electromagnetic wave. B) Mechanical wave. C) Ocean wave. D) Any way can do this. Show Answer Correct Answer: B) Mechanical wave. 12. If a string is attached to a fixed point, the pulse will be reflected back at the same amplitude ..... A) AND DIRECTION. B) BUT INVERTED. C) BUT DIFFERENT FREQUENCY. D) BUT DIFFERENT ENERGY LEVEL. Show Answer Correct Answer: B) BUT INVERTED. 13. Which of the following can sound travel through? A) Solid. B) Liquid. C) Gas. D) All of the above. Show Answer Correct Answer: D) All of the above. 14. What is the main use of concave lenses? A) To magnify objects. B) To focus light to a point. C) To spread light rays apart. D) To bend light. Show Answer Correct Answer: C) To spread light rays apart. 15. Amplitude is a measurement of the A) Speed of the wave. B) Pitch. C) Distance of wavelength. D) Amount of energy the wave has. Show Answer Correct Answer: D) Amount of energy the wave has. 16. Does a 5.2 x 10$^{5}$ Hz or 1.5 x 10$^{6}$ Hz AM radio wave have a longer wavelength? A) 5.2 x 10$^{5}$. B) 1.5 x 10$^{6}$. C) They're both the same. D) None of the above. Show Answer Correct Answer: A) 5.2 x 10$^{5}$. 17. The frequency of a wave is doubled when the wavelength remains the same. What happens to the speed of the wave? A) It doubles. B) It quadruples. C) Remains unchanged. D) It is cut to one-half. E) It is cut to one-fourth. Show Answer Correct Answer: A) It doubles. 18. How high or low a sound is; depends on the frequency (greater frequency= higher pitch) A) Pitch. B) Frequency. C) Sound. D) Medium. Show Answer Correct Answer: A) Pitch. 19. If an object moves toward you on a warm day with a sound frequency of 500 Hz at a speed of 10 meters per second, what frequency do you detect?The speed of sound in this particular situation is 343 m/s. You are stationary. A) 510 Hz. B) 515 Hz. C) 610 Hz. D) 615 Hz. Show Answer Correct Answer: B) 515 Hz. 20. What is one of the main differences between mechanical and electromagnetic waves? A) Electromagnetic waves are always transverse, mechanical waves are always longitudinal. B) Electromagnetic waves do not need a medium to travel in but mechanical waves do. C) Electromagnetic waves do not transfer energy, but mechanical waves do. D) Electromagnetic do not have wavelengths but mechanical waves do. Show Answer Correct Answer: B) Electromagnetic waves do not need a medium to travel in but mechanical waves do. 21. As a wavelength increases, the frequency A) Decreases. B) Increases. C) Stays the same. D) Fluctuates up and down. Show Answer Correct Answer: A) Decreases. 22. What type of wave is sound? A) Electromagnetic. B) Mechanical. C) Both Electromagnetic and Mechanical. D) None of the above. Show Answer Correct Answer: B) Mechanical. 23. A single crest traveling through a medium is called a ..... A) Wave. B) Pulse. C) Amplitude. D) Tomato. Show Answer Correct Answer: B) Pulse. 24. Complete the sentence:The wavelength of a wave is A) The time it takes for one complete oscillation of the wave. B) The number of waves per second. C) The maximum displacement from the rest position. D) The distance between two successive points on a wave. Show Answer Correct Answer: D) The distance between two successive points on a wave. 25. A physics student takes her pulse and determines that her heart beats periodically 60 times in 60 seconds. The period of her heartbeat is A) 1 Hz. B) 60 Hz. C) 1 s. D) 60 s. Show Answer Correct Answer: C) 1 s. ← 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