This quiz works best with JavaScript enabled. Home > Class 11 > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 28 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 28 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When a sound source is moving towards you, what happens to the pitch of the sound you hear due to the Doppler Effect? A) It increases. B) It decreases. C) It remains the same. D) It becomes louder. Show Answer Correct Answer: A) It increases. 2. The Moon is 380 000 km from the Earth. A laser light beam is directed from the Earth to theMoon. The beam is reflected back to the Earth.How long does it take for the light to travel to the Moon and back to the Earth? A) 1.27 ms. B) 2.53 ms. C) 1.27 s. D) 2.53 s. E) 100 s. Show Answer Correct Answer: D) 2.53 s. 3. What is superposition in wave theory? A) Superposition is the process of waves canceling each other out. B) Superposition refers to the speed of a wave in a medium. C) Superposition is the phenomenon of waves reflecting off surfaces. D) Superposition is the principle that the resultant wave is the sum of overlapping waves. Show Answer Correct Answer: D) Superposition is the principle that the resultant wave is the sum of overlapping waves. 4. Explain the Doppler effect in sound waves. A) The Doppler effect is unrelated to the position of the observer. B) The Doppler effect only occurs with light waves. C) The Doppler effect is the change in speed of sound waves regardless of motion. D) The Doppler effect is the change in frequency or wavelength of sound waves due to the relative motion between the source and the observer. Show Answer Correct Answer: D) The Doppler effect is the change in frequency or wavelength of sound waves due to the relative motion between the source and the observer. 5. Do light waves need a medium to travel through? A) NO. B) YES. C) All the above. D) None of the above. Show Answer Correct Answer: A) NO. 6. Define the law of reflection. A) The law of reflection states that light cannot be reflected. B) The law of reflection states that the angle of incidence is always greater than the angle of reflection. C) The law of reflection states that light travels in a straight line without changing direction. D) The law of reflection states that the angle of incidence is equal to the angle of reflection. Show Answer Correct Answer: D) The law of reflection states that the angle of incidence is equal to the angle of reflection. 7. If a wave has a greater frequency, what happens to number of waves per second? A) Increases. B) Decreases. C) Stays the same. D) None of the above. Show Answer Correct Answer: A) Increases. 8. The term used to describe the frequency of a musical note. A) Frequency. B) Wavelength. C) Pitch. D) Amplitude. Show Answer Correct Answer: C) Pitch. 9. If the wavelength of a sound wave produced by an audio (sound producing) source is 0.5 m, the frequency is 666 Hz, then the velocity of propagation of sound in air is ..... m/sec A) 330. B) 333. C) 338. D) 346. Show Answer Correct Answer: B) 333. 10. Fill in the blank:The ..... of a wave is the distance between two consecutive points in phase. A) Wavelength. B) Velocity. C) Amplitude. D) Frequency. Show Answer Correct Answer: A) Wavelength. 11. The number of waves that pass a fixed point in a given amount of time is ..... A) Frequency. B) Wave speed. C) Amplitude. D) Wavelength. Show Answer Correct Answer: A) Frequency. 12. A wave that has the vibration perpendicular to the direction of the wave is called: A) Longitudinal. B) Transverse. C) All the above. D) None of the above. Show Answer Correct Answer: B) Transverse. 13. You shake a slinky up and down, creating 75 waves in 45.0 s. What is the frequency of the waves that you created? A) 1.67 Hz. B) 1.67 s. C) 0.6 Hz. D) 0.6 s. Show Answer Correct Answer: A) 1.67 Hz. 14. Are destructive and constructive the same A) No. B) Yes. C) All the above. D) None of the above. Show Answer Correct Answer: A) No. 15. The frequency is defined as the number of waves that pass a point per second (a) A) A. True. B) False. C) Don't know/Can't remember. D) None of the above. Show Answer Correct Answer: A) A. True. 16. What kind of waves are longitudinal waves? A) Waves in which the oscillation is perpendicular to the direction of wave travel. B) Waves in which the oscillation is random. C) Waves in which the oscillation is in the same direction as the wave travel. D) Waves in which the oscillation is circular. Show Answer Correct Answer: C) Waves in which the oscillation is in the same direction as the wave travel. 17. Waves transport the energy of disturbances. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. Which of the following occurs as the frequency of a wave decreases? A) The wavelength increases. B) The wavelength decreases. C) The wavelength increases and then decreases. D) The wavelength remains the same. Show Answer Correct Answer: A) The wavelength increases. 19. Helpful in military night vision goggles A) Radio wave. B) Microwave. C) Infrared. D) Light. Show Answer Correct Answer: C) Infrared. 20. The maximum refractive angle when a light ray can travel from oil to air is ..... A) 90. B) 60. C) 45. D) 0. Show Answer Correct Answer: A) 90. 21. What type of wave is sound classified as? A) Transverse wave. B) Surface wave. C) Longitudinal wave. D) Electromagnetic wave. Show Answer Correct Answer: C) Longitudinal wave. 22. What is the period of a pendulum A) How many times the pendulum swings before it stops. B) How many times the pendulum passes a point in one second. C) One complete cycle (complete to and fro motion). D) One complete cycle bouncing up and down. Show Answer Correct Answer: C) One complete cycle (complete to and fro motion). 23. The motion of the listener or the source of sound causes A) Resonance. B) Shock waves. C) Echoes. D) The Doppler Effect. Show Answer Correct Answer: D) The Doppler Effect. 24. Explain the concept of wave frequency. A) Wave frequency is the amplitude of a wave measured in decibels. B) Wave frequency is the number of cycles of a wave that occur in one second, measured in hertz (Hz). C) Wave frequency is the speed of a wave in a medium. D) Wave frequency refers to the distance between two consecutive peaks of a wave. Show Answer Correct Answer: B) Wave frequency is the number of cycles of a wave that occur in one second, measured in hertz (Hz). 25. The color of an object is due to A) The wavelength it absorbs. B) The wavelength it reflects. C) The speed it absorbs. D) The medium of the frequency. Show Answer Correct Answer: B) The wavelength it reflects. ← 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