This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 14 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Refraction happens when a wave A) Goes through a hole in a barrier. B) Hits a surface it cannot pass through. C) Enters a new medium at an angle. D) Travels through outer space. Show Answer Correct Answer: C) Enters a new medium at an angle. 2. The de Broglie wavelength of an electron movingwith a velocity $1.5\times10^8\\frac{m}{ses}$ A) $\frac{1}{4}$. B) $\frac{1}{2}$. C) $2$. D) $4$. Show Answer Correct Answer: A) $\frac{1}{4}$. 3. It is the amount of energy a sound wave carries per second through a unit area. A) Pitch. B) Loudness. C) Intensity. D) Frequency. Show Answer Correct Answer: C) Intensity. 4. Which of the following can act as media for a wave? (a) A) Solids only. B) Liquids only. C) Gases only. D) D. Solids, liquids, and gases. Show Answer Correct Answer: D) D. Solids, liquids, and gases. 5. How would you describe the amplitude of a longitudinal wave? A) Density of rarefaction. B) Density of the compression. C) From centerline to compression. D) From centerline to crest or trough. Show Answer Correct Answer: B) Density of the compression. 6. What happens when the crest of one wave meets the trough of another wave? A) The resulting wave is has a bigger amplitude. B) The resulting wave has a smaller amplitude. C) The resulting wave has the same amplitude as the original waves. D) There is no change to the amplitude of the waves. Show Answer Correct Answer: B) The resulting wave has a smaller amplitude. 7. The concept of beats happens because of A) Refraction. B) Reflection. C) Constructive interference. D) None of the above. Show Answer Correct Answer: C) Constructive interference. 8. The length traveled in one cycle is the ..... A) Frequency. B) Wavelength. C) Wave Speed. D) Period. E) Amplitude. Show Answer Correct Answer: B) Wavelength. 9. What is the term used to describe the merging of waves of different frequencies and wavelengths? A) Diffraction. B) Superposition. C) Interference. D) Reflection. Show Answer Correct Answer: B) Superposition. 10. Explain the term 'refraction' of waves. A) Refraction of waves is the bending of waves as they pass from one medium to another with different densities. B) Refraction of waves is the absorption of waves by the medium they pass through. C) Refraction of waves is the amplification of waves as they move through different mediums. D) Refraction of waves is the splitting of waves into multiple directions. Show Answer Correct Answer: A) Refraction of waves is the bending of waves as they pass from one medium to another with different densities. 11. What does midpoint mean? A) Middle of a wave (between the crest and the trough). B) Middle of a wave (between the crest and the amplitude). C) All the above. D) None of the above. Show Answer Correct Answer: A) Middle of a wave (between the crest and the trough). 12. What is light primarily described as? A) A particle. B) A wave. C) A chemical reaction. D) A form of sound. Show Answer Correct Answer: B) A wave. 13. According to Maxwell's Hypothesis, a changing electric field gives rise to? A) Magnetic Dipole. B) Electric Field. C) Induced EMF. D) Magnetic Field. Show Answer Correct Answer: D) Magnetic Field. 14. Examples of ..... waves include sound waves and earthquake P-waves. A) Transverse. B) Longitudinal. C) All the above. D) None of the above. Show Answer Correct Answer: B) Longitudinal. 15. What is the formula to calculate the frequency of a wave? A) Frequency = Amplitude x Time. B) Frequency = Velocity x Time. C) Frequency = Energy / Wavelength. D) Frequency = Speed of the wave / Wavelength. Show Answer Correct Answer: D) Frequency = Speed of the wave / Wavelength. 16. A tube of length L$_{1}$ is open at both ends. A second tube of length L$_{2}$ is closed at one end and open at the other end. This second tube resonates at the same fundamental frequency as the first tube. What is the value of L$_{2}$? A) 2 L$_{1}$. B) 1/2 L$_{1}$. C) L$_{1}$. D) 4 L$_{1}$. Show Answer Correct Answer: B) 1/2 L$_{1}$. 17. Evaluate the claim: "Waves travel faster in water than in air." If the speed of a wave in water is 1500 m/s and the wavelength is 3 meters, calculate the frequency. Which mathematical relationship should be used? A) Frequency = Speed / Wavelength. B) Frequency = Speed x Wavelength. C) Frequency = Speed-Wavelength. D) Frequency = Wavelength / Speed. Show Answer Correct Answer: A) Frequency = Speed / Wavelength. 18. A wave with a very long wavelength has a ..... A) Large amplitude. B) High frequency. C) Short amplitude. D) Low frequency. Show Answer Correct Answer: D) Low frequency. 19. What is the principle behind LED lights? A) LED lights operate using thermal radiation. B) LED lights emit light through chemical reactions. C) LED lights generate light by incandescent heating. D) LED lights work by electroluminescence in semiconductors. Show Answer Correct Answer: D) LED lights work by electroluminescence in semiconductors. 20. What is "rarefaction" in the context of longitudinal waves? A) The amplitude of the wave. B) The part where wave particles are spread apart. C) The part where wave particles are compressed. D) The frequency of the wave. Show Answer Correct Answer: B) The part where wave particles are spread apart. 21. The frequency of a sound wave determines its A) Pitch. B) Speed. C) Refraction. D) Volume. Show Answer Correct Answer: A) Pitch. 22. Sound waves are longitudinal waves. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 23. Which type of wave can travel the longest distance without losing energy? A) Electromagnetic waves. B) Water waves. C) Sound waves. D) Seismic waves. Show Answer Correct Answer: A) Electromagnetic waves. 24. What is another name for wave height? A) Frequency. B) Wavelength. C) Amplitude. D) Origin. Show Answer Correct Answer: C) Amplitude. 25. The number of waves that go past a point in one second A) Amplitude. B) Wavelength. C) Frequency. D) None of the above. Show Answer Correct Answer: C) Frequency. 26. The number of complete oscillations a wave makes each second is the ..... of the wave. A) Frequency. B) Fortitude. C) Amplitude. D) Period. Show Answer Correct Answer: A) Frequency. 27. Sound waves travel fastest in A) Steel. B) A vacuum. C) Water. D) Air. Show Answer Correct Answer: A) Steel. 28. If a wave has a wavelength of 50 m and a frequency of 25 Hz, what is its velocity? A) 2 m/s. B) 250 m/s. C) 1250 m/s. D) 150 m/s. Show Answer Correct Answer: C) 1250 m/s. 29. Which has the greatest energy? A) Infared. B) Ultraviolet. C) Microwave. D) None of the above. Show Answer Correct Answer: B) Ultraviolet. 30. Sound waves that are beyond the range of human ear are known as ..... A) Infrasonic waves. B) Ultrasonic waves. C) All the above. D) None of the above. Show Answer Correct Answer: B) Ultrasonic waves. 31. When the crests of one wave overlap the crests of another wave or waves, this occurs. A) Diffraction. B) Constructiveinterference. C) Destructiveinterference. D) Resonantfrequencies. Show Answer Correct Answer: B) Constructiveinterference. 32. Which property of the wave would change if you changed the amount of energy the wave had? A) Wave speed. B) Frequency. C) Amplitude. D) Wavelength. Show Answer Correct Answer: C) Amplitude. 33. Speed of longitudinal wave in solid? A) V= $\sqrt{\frac{\gamma P}{\rho}}$. B) V= $\sqrt{\frac{T}{\mu}}$. C) V= $\sqrt{\frac{B}{\rho}}$. D) V= $\sqrt{\frac{Y}{\rho}}$. Show Answer Correct Answer: D) V= $\sqrt{\frac{Y}{\rho}}$. 34. What is an harmonic of 10 Hz A) 15 Hz. B) 20 Hz. C) 5 Hz. D) 35 Hz. Show Answer Correct Answer: B) 20 Hz. 35. A jeweler buys a sheet of diamond. She fires a laser into the diamond. The path of the laser in the diamond is visible. The laser hits the surface of the diamond on the outside at 29.8$^\circ$. At what angle does it enter the diamond? A) 1.20$^\circ$. B) 11.9$^\circ$. C) 0.205$^\circ$. D) Not possible. Show Answer Correct Answer: B) 11.9$^\circ$. 36. When energy decreases, amplitude ..... A) Increases. B) Decreases. C) All the above. D) None of the above. Show Answer Correct Answer: B) Decreases. 37. What should be used to measure the distance between two peaks when investigating the frequency of a sound wave? A) Time base. B) Compass. C) Ruler. D) Protractor. Show Answer Correct Answer: A) Time base. 38. Which of the following best describes the wavelength of a wave? A) The distance between two consecutive crests or troughs. B) The height from the rest position to the crest. C) The time it takes for one full vibration of a particle. D) The speed of the wave through a mediumTagsDOK Level 1:Recall. Show Answer Correct Answer: A) The distance between two consecutive crests or troughs. 39. The period of a wave is 0.1 s. What is the frequency of this wave? A) 0.1 Hz. B) 100 Hz. C) 10 Hz. D) 1 Hz. Show Answer Correct Answer: D) 1 Hz. 40. What is the term for the number of waves that pass a point in one second? A) Wavelength. B) Frequency. C) Amplitude. D) Speed. Show Answer Correct Answer: B) Frequency. 41. When analyzing wave data in different media, if the frequency increases while the wavelength remains constant, what is likely to happen to the wave speed? A) It depends on other factors. B) It decreases. C) It increases. D) It stays the same. Show Answer Correct Answer: C) It increases. 42. As a longitudinal wave moves forward, the particles move: A) Perpendicular to the wave's motion. B) Parallel to the wave's motion. C) Stand in one place. D) Move completely down the spring. Show Answer Correct Answer: B) Parallel to the wave's motion. 43. Hertz is the measure of a wave's ..... A) Pitch. B) Amplitude. C) Frequency. D) Wavelength. Show Answer Correct Answer: C) Frequency. 44. Why are gamma rays more hazardous to human tissue than radio waves or microwaves? A) Gamma rays have longer wavelengths, which penetrate tissues deeply. B) Gamma rays are damaging to biological cells and DNA. C) Gamma Rays scatter off bones, creating harmful byproducts. D) Gamma rays interact with water molecules to generate radiation. Show Answer Correct Answer: B) Gamma rays are damaging to biological cells and DNA. 45. The string on a guitar is observed to vibrate at frequencies of 320 hertz, 380 hertz and 440 hertz. The string's fundamental frequency is. A) 440 hertz. B) 320 hertz. C) 60 hertz. D) 160 hertz. Show Answer Correct Answer: C) 60 hertz. 46. Which of the following describes the distance between two consecutive crests of a wave? A) Amplitude. B) Wavelength. C) Frequency. D) Speed. Show Answer Correct Answer: B) Wavelength. 47. What is the term for the frequency at which a system naturally oscillates? A) Natural frequency. B) Driving frequency. C) Resonance frequency. D) Amplitude of motion. Show Answer Correct Answer: A) Natural frequency. 48. Electromagnetic energy travels through space in waves. The electromagnetic spectrum includes all electromagnetic waves, arranged according to frequency and wavelength. Which of these is an example of an electromagnetic wave? A) Radio Wave. B) Ocean Wave. C) Earthquake Wave. D) Sound Wave. Show Answer Correct Answer: A) Radio Wave. 49. What is the difference between natural and artificial light sources? A) Natural light is always brighter than artificial light. B) Natural light comes from nature (e.g., the sun), while artificial light is man-made (e.g., light bulbs). C) Natural light can be created using electricity. D) Artificial light is only produced by the moon. Show Answer Correct Answer: B) Natural light comes from nature (e.g., the sun), while artificial light is man-made (e.g., light bulbs). 50. As frequency ..... , pitch ..... A) Rises, falls. B) Decreases, increases. C) Increases, decreases. D) Increases, increases. Show Answer Correct Answer: D) Increases, increases. 51. A city street water drain pours into the Puget Sound. The drained water creates waves in the water. It travels away from the drain and it has a wavelength of 23.0 cm and the frequency is 3.55 Hz. What is the speed of the wave? A) 0.154 m/s. B) 0.0648 m/s. C) 81.7 m/s. D) 0.817 m/s. Show Answer Correct Answer: D) 0.817 m/s. 52. In what type of wave are the vibrations parallel to the direction of energy transfer A) Transverse. B) Longitudinal. C) All the above. D) None of the above. Show Answer Correct Answer: B) Longitudinal. 53. Which of these values tell us how much a light wave will change direction when it enters a new medium? A) Refractive number. B) Refraction index. C) Refraction number. D) Refractive index. Show Answer Correct Answer: D) Refractive index. 54. What does a blue-shift in light indicate? A) An object moving away from us. B) An object moving towards us. C) An object is stationary. D) An object losing energy. Show Answer Correct Answer: B) An object moving towards us. 55. A sound wave moving through the air is what kind of wave? A) A Longitudinal. B) Water wave. C) A transverse wave. D) Hand wave. Show Answer Correct Answer: A) A Longitudinal. 56. All sound begins with: A) A person. B) Space. C) Light. D) A vibration. Show Answer Correct Answer: D) A vibration. 57. A frequency of 50 MHz is the same as ..... ? A) 50, 000, 000 Hz. B) 50, 000 Hz. C) 50 Hz. D) 50, 000, 000, 000 Hz. Show Answer Correct Answer: A) 50, 000, 000 Hz. 58. What happens to frequency when the energy increases? A) It increases. B) It decreases. C) It stays the same. D) None of the above. Show Answer Correct Answer: A) It increases. 59. A pattern of vibration that simulates a wave that is standing still A) Interference. B) Standingwave. C) Diffraction. D) Reflection. Show Answer Correct Answer: B) Standingwave. 60. Carries energy from one place to another A) Frequency. B) Waves. C) Amplitude. D) Crest. Show Answer Correct Answer: B) Waves. ← PreviousNext →Related QuizzesScience QuizzesClass 11 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books