This quiz works best with JavaScript enabled. Home > Cbse > Class 11 > Science > Physics Part Ii > Class 11 Physics (Part Ii) Chapter 17 Waves – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 20 waves pass a point in 5 s. How is the frequency of these waves? A) 5 Hz. B) 20 Hz. C) 100 Hz. D) 4 Hz. Show Answer Correct Answer: D) 4 Hz. 2. What happens to white light when it passes through a red filter A) It all turns red. B) All colours are absorbed and red is reflected. C) Most colours are absorbed and red is transmitted. D) Most colours are absorbed and red is reflected. Show Answer Correct Answer: C) Most colours are absorbed and red is transmitted. 3. Which type of wave requires a medium to travel through? A) Mechanical waves. B) Transverse waves. C) Electromagnetic waves. D) Longitudinal waves. Show Answer Correct Answer: A) Mechanical waves. 4. The time it takes for a wave to cycle from one peak to the next is called the A) Hertz. B) Period. C) Frequency. D) Phase. Show Answer Correct Answer: B) Period. 5. If humans cannot see ultraviolet waves, how can ultraviolet light be used to gather evidence of a crime? A) Ultraviolet light detects the presence of radioactive substances. B) Ultraviolet light shows cold areas as blue and warm areas as red. C) Ultraviolet light causes substances to fluoresce and give off visible light. D) Ultraviolet light transmits information to AM and FM radio receivers. Show Answer Correct Answer: C) Ultraviolet light causes substances to fluoresce and give off visible light. 6. A ship is lost in fog and blows a horn at 22.9 Hz. The ship is not moving because it doesn't want to hit anything. A seagull is squawking back at 1200 Hz and moving away from the ship at 4.521 m/s.What is the frequency of sound the seagull hear? A) 22.6 Hz. B) 23.2 Hz. C) 1180 Hz. D) None of the above. Show Answer Correct Answer: A) 22.6 Hz. 7. What is an example of a LONGITUDINAL wave? A) Light Waves. B) Sound. C) X-Ray. D) A WATER WAVE. Show Answer Correct Answer: B) Sound. 8. Examples of this type of waves include water waves, waves on a string/jump rope, and light waves. A) Transverse. B) Longitudinal. C) All the above. D) None of the above. Show Answer Correct Answer: A) Transverse. 9. The pattern of the standing wave is called the A) Interference. B) Antinode. C) Harmonic. D) None of the above. Show Answer Correct Answer: C) Harmonic. 10. What happens to the frequency of a wave when the amplitude is tripled? A) The frequency is tripled. B) The frequency is a third of what it was. C) Amplitude does not affect frequency. D) None of the above. Show Answer Correct Answer: C) Amplitude does not affect frequency. 11. What will most likely happen if a light wave moves through a solid? A) It will decrease in speed. B) It will decrease in wavelength. C) It will increase in speed. D) It will increase in wavelength. Show Answer Correct Answer: A) It will decrease in speed. 12. What is the name given to the lowest point of a wave? A) Trough. B) Wavelength. C) Amplitude. D) Crest. Show Answer Correct Answer: A) Trough. 13. What type of wave has vibrations at a right angle to the direction of energy transfer? A) Radial. B) Longitudinal. C) Circular. D) Transverse. Show Answer Correct Answer: D) Transverse. 14. Sound travels as a(n) A) Transverse wave. B) Longitudinal wave. C) Electromagnetic wave. D) All of the above. Show Answer Correct Answer: B) Longitudinal wave. 15. Are sound waves transverse waves or longitudinal/compressional waves? A) Transverse waves. B) Longitudinal/Compressional waves. C) All the above. D) None of the above. Show Answer Correct Answer: B) Longitudinal/Compressional waves. 16. Waves with a higher frequency have a ..... A) Shorter wavelength. B) Shorter amplitude. C) Higher amplitude. D) Longer wavelength. Show Answer Correct Answer: A) Shorter wavelength. 17. What distinguishes electromagnetic waves from mechanical waves? A) Electromagnetic waves can travel through a vacuum. B) Electromagnetic waves require a medium to travel. C) Electromagnetic waves can only travel through water. D) Electromagnetic waves are only generated by natural phenomena. Show Answer Correct Answer: A) Electromagnetic waves can travel through a vacuum. 18. Which of the following colors has the shortest wavelength? A) Violet. B) Blue. C) Red. D) Green. Show Answer Correct Answer: A) Violet. 19. A sound wave is moving through a tube. What is the frequency of the note of the sound wave if it has a wavelength of 0.670 m? A) 448000000 Hz. B) 230. Hz. C) 201000000 Hz. D) 512 Hz. Show Answer Correct Answer: D) 512 Hz. 20. Which frequency range can humans typically hear? A) 20 to 20, 000 Hz. B) 30 to 25, 000 Hz. C) 5 to 15, 000 Hz. D) 10 to 10, 000 Hz. Show Answer Correct Answer: A) 20 to 20, 000 Hz. 21. A blue tshirt looks blue because of ..... A) Reflection. B) Refraction. C) Diffraction. D) None of the above. Show Answer Correct Answer: A) Reflection. 22. Plays important role in wireless communication A) Visible light. B) Ultraviolet. C) Infrared. D) Microwave. Show Answer Correct Answer: D) Microwave. 23. The material or substance through which a wave travel is called a: A) Transmitter. B) Vibration. C) Mode. D) Medium. Show Answer Correct Answer: D) Medium. 24. When viewed from the side, a pencil appears to be broken. What process causes this to happen? A) Refraction. B) Evaporation. C) Reflection. D) Absorption. Show Answer Correct Answer: A) Refraction. 25. Electromagnetic waves are: A) Transverse waves. B) Longitudinal waves. C) Longitudinal and transverse waves. D) Sound waves. Show Answer Correct Answer: A) Transverse waves. 26. When light travels from air into glass, what typically happens to its speed and wavelength? A) Speed increases, wavelength increases. B) Speed increases, wavelength decreases. C) Speed decreases, wavelength decreases. D) Speed decreases, wavelength increases. Show Answer Correct Answer: C) Speed decreases, wavelength decreases. 27. Transverse waves are ..... A) Parallel. B) Perpendicular. C) Weird. D) None of the above. Show Answer Correct Answer: B) Perpendicular. 28. The distance between the same two points on a wave is called ..... A) Oscillation. B) Amplitude. C) Wavelength. D) Frequency. Show Answer Correct Answer: C) Wavelength. 29. If a graph shows an inverse relationship between frequency and wavelength in different media, what can be inferred about the speed of waves? A) It decreases. B) It remains constant. C) It increases. D) No relationship can be determined. Show Answer Correct Answer: B) It remains constant. 30. If the wavelength gets longer, the frequency gets A) Higher. B) Lower. C) All the above. D) None of the above. Show Answer Correct Answer: B) Lower. 31. What is the equation for the relationship between focal length, position of the object, and position of the image? A) 1/f = u-v. B) 1/f = 1/u + 1/v. C) F = u-v. D) F = u + v. Show Answer Correct Answer: B) 1/f = 1/u + 1/v. 32. What is the term for the number of waves that pass a fixed point in a given amount of time? A) Amplitude. B) Frequency. C) Wavelength. D) VelocityTagsDOK Level 1:Recall. Show Answer Correct Answer: B) Frequency. 33. What is transferred in waves? A) Energy. B) Objects. C) Light. D) Magic. Show Answer Correct Answer: A) Energy. 34. Which of the following is transmitted by waves? A) Matter. B) Atoms. C) Resonance. D) Energy. Show Answer Correct Answer: D) Energy. 35. It is the change in frequency (in pitch) of the sound wave in relation to an observer. A) Doopler effect. B) Vibration. C) Doppler effect. D) Frequency. Show Answer Correct Answer: C) Doppler effect. 36. Two waves are traveling through a container of an inert gas. Wave A has an amplitude of 0.4 cm. Wave B has an amplitude of 1.2 cm. The energy transported by wave B must be ..... the energy transported by wave A. A) 9 times greater. B) 16 times greater. C) Doubled. D) 4 times greater. Show Answer Correct Answer: A) 9 times greater. 37. A thin coating, of refractive index 1.2, is applied to a glass camera lens, of refractive index n > 1.2, to minimize the intensity of the light reflected. The wavelength of the light is . The coating thickness required to minimize the intensity of reflected light is A) $\frac{\lambda}{2\times1.2}$. B) $\frac{\lambda}{4\times1.2}$. C) $\frac{1.2\lambda}{4}$. D) $\frac{\lambda}{2}$. Show Answer Correct Answer: B) $\frac{\lambda}{4\times1.2}$. 38. TRUE OR FALSE:Light is a type of transverse wave A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 39. In a sound wave experiment, if the frequency is 400 Hz and the wavelength is 0.8 meters, what is the speed of the sound wave? A) 480 m/s. B) 320 m/s. C) 200 m/s. D) 500 m/s. Show Answer Correct Answer: B) 320 m/s. 40. Sound travels through the air as waves. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 41. What is the standard unit of frequency? A) M/s. B) M. C) Hz. D) Lambda. Show Answer Correct Answer: C) Hz. 42. An electron is accelerated from rest, between twopoints A and B at which the potentials are 20V and40 V respectively. The De Broglie wavelengthassociated with the electron at B will be- A) 0.75 A. B) 7.5 A. C) 2.75 A. D) 2.75 m. Show Answer Correct Answer: C) 2.75 A. 43. Turning up the volume on the TV causes a change in which wave characteristics? A) Energy/intensity of sound and amplitude. B) Intensity/energy of sound and frequency. C) Amplitude and wavelength. D) Amplitude and frequency. Show Answer Correct Answer: A) Energy/intensity of sound and amplitude. 44. The colour of visible light with the shortest wavelength is: A) Violet. B) Blue. C) Red. D) Green. Show Answer Correct Answer: A) Violet. 45. Visible light wavelengths range approximately from: A) 400 nm to 700 nm. B) 350 nm to 600 nm. C) 300 nm to 500 nm. D) 450 nm to 800 nm. Show Answer Correct Answer: A) 400 nm to 700 nm. 46. Fill in the blank:Black bodies are perfect ..... and perfect ..... A) Absorbers and emitters. B) Conductors and insulators. C) Reflectors and absorbers. D) Transmitters and receivers. Show Answer Correct Answer: A) Absorbers and emitters. 47. If a guitar string has a fundamental frequency of 500 Hz, what is the frequency of its third harmonic? A) 1000 Hz. B) 1500 Hz. C) 500 Hz. D) 250 Hz. Show Answer Correct Answer: B) 1500 Hz. 48. A wave travels from a less dense medium to a more dense medium. The reflected wave is ..... compared to the incident wave. A) Inverted with the same amplitude. B) Upright with the same amplitude. C) Upright with a lower amplitude. D) Inverted with a lower amplitude. Show Answer Correct Answer: C) Upright with a lower amplitude. 49. Which of the following does NOT belong in the electromagnetic spectrum: A) X-ray. B) Ultra violet rays. C) Microwaves. D) Sound wave. Show Answer Correct Answer: D) Sound wave. 50. What happens to the pitch of a sound as the source moves away from you? A) The pitch of the sound increases as the source moves away from you. B) The pitch of the sound fluctuates randomly as the source moves away from you. C) The pitch of the sound remains the same as the source moves away from you. D) The pitch of the sound decreases as the source moves away from you. Show Answer Correct Answer: D) The pitch of the sound decreases as the source moves away from you. 51. In a Young's double-slit experiment, the slit separation is doubled. To maintain the same fringe spacing on the screen, the screen-to-slit distance D must be changed to: A) 4D. B) 2D. C) D/2. D) D $\sqrt{2}$. Show Answer Correct Answer: B) 2D. 52. Which of these is false? A) Sound waves move in all directions. B) Sound waves only work if air particles are present. C) Sound does not travel through water. D) None of the above. Show Answer Correct Answer: C) Sound does not travel through water. 53. If a wave has a velocity of 50 m/sec, and a frequency of 2 m, then what is the wavelength of the wave pattern? A) 25 kg. B) 25 N. C) 25 m. D) 25 sec. Show Answer Correct Answer: C) 25 m. 54. What is the formula for finding the wavelength of a wave? A) $\lambda$ / f = v. B) V f = $\lambda$. C) $\lambda$ / v = f. D) V = f $\lambda$. Show Answer Correct Answer: D) V = f $\lambda$. 55. How are electromagnetic waves different from other waves? A) They transmit energy instead of matter. B) Because joe. C) They can change direction by reflection. D) They can travel through empty space. E) They have very short wavelengths. Show Answer Correct Answer: D) They can travel through empty space. 56. Which of the following will change when a wave is refracted at a boundary?I VelocityII WavelengthIII Frequency A) I only. B) III only. C) I and II only. D) I, II and III. Show Answer Correct Answer: C) I and II only. 57. Water waves bending around a dock is an example of ..... A) Rarefaction. B) Compression. C) Diffraction. D) Refraction. Show Answer Correct Answer: C) Diffraction. 58. The frequency of a wave increases when the speed remains the same. What happens to the wavelength? A) It increases. B) It decreases. C) Stays unchaged. D) It increases first and then decreases. E) It decreases first and then increases. Show Answer Correct Answer: B) It decreases. 59. What is an example of a radio wave? A) Heat lamp. B) Sunlight. C) Television. D) Vision. Show Answer Correct Answer: C) Television. 60. From which two combinations of mediums will light bend the most? A) Water to glass. B) Air to glass. C) Water to air. D) Glass to water. Show Answer Correct Answer: B) Air to glass. ← 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 8Class 11 Physics (Part Ii) Chapter 17 Waves Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books