Beats and basic wave phenomena - One Line Questions

1. The maximum amplitude in beats occurs when the phase difference between the two waves is: — 0
2. The minimum amplitude (near zero) in beats occurs when the phase difference between the two waves is: — π
3. Two tuning forks A and B vibrate with frequencies 400 Hz and 405 Hz respectively. The number of beats heard per second is: — 5
4. What is the time interval between two consecutive maxima of loudness in the phenomenon of beats? — 1 / |f1 - f2|
5. When a tuning fork of frequency 'f' is sounded with a tuning fork of frequency 250 Hz, 5 beats are heard per second. If the frequency of the first tuning fork is increased, the number of beats per second increases. What is the original frequency 'f'? — 245 Hz
6. When tuning fork A (frequency 256 Hz) and tuning fork B are sounded together, 5 beats are heard in 10 seconds. If the frequency of B is slightly increased, the number of beats per second increases. What is the frequency of B? — 251 Hz
7. A tuning fork of frequency 256 Hz is sounded with another tuning fork. 4 beats are heard in 2 seconds. The frequency of the second tuning fork can be: — 252 Hz or 260 Hz
8. Two identical tuning forks produce 6 beats in 3 seconds. If the frequency of one tuning fork is 300 Hz, what is the frequency of the other tuning fork? — 298 Hz or 302 Hz
9. Two tuning forks A and B produce 8 beats in 4 seconds. When fork A is filed, 4 beats are produced in 2 seconds. If the frequency of fork B is 384 Hz, find the original frequency of fork A. — 388 Hz
10. A siren produces 4 beats per second with a tuning fork of frequency 400 Hz. When the siren is moved away from a stationary observer at a speed of 17 m/s, the apparent frequency decreases by 10 Hz. The speed of sound is 340 m/s. What is the original frequency of the siren? — 420 Hz
11. A tuning fork of frequency 440 Hz produces beats with a standard tuning fork. If 4 beats are heard in 2 seconds, what is the frequency of the other tuning fork? — 436 Hz or 444 Hz
12. A tuning fork A produces 4 beats per second with tuning fork B. When a little wax is attached to A, it produces 6 beats per second with B. If the frequency of B is 500 Hz, what is the frequency of A? — 504 Hz
13. Two tuning forks A and B produce 5 beats per second. When the prong of fork A is slightly loaded with wax, 3 beats per second are produced. If the frequency of fork B is 500 Hz, what is the original frequency of fork A? — 505 Hz
14. A source of sound emitting a frequency of 500 Hz is moving towards a stationary observer with a velocity of 30 m/s. The speed of sound is 330 m/s. The apparent frequency heard by the observer is: — 549.5 Hz
15. If two waves of amplitude A1 and A2 interfere constructively, the resultant amplitude is: — A1 + A2
16. If two waves of amplitude A1 and A2 interfere destructively, the resultant amplitude is: — A1 - A2
17. If two sound waves with amplitudes A1 and A2 and frequencies f1 and f2 superpose, the maximum amplitude of the resultant wave is: — A1 + A2
18. If two sound waves with amplitudes A1 and A2 and frequencies f1 and f2 superpose, the minimum amplitude of the resultant wave is: — A1 - A2
19. Which of the following statements about beats is INCORRECT? — Beats are produced by two sources of sound with widely different frequencies.
20. The phenomenon of beats is a result of: — The superposition of two waves of nearly equal frequencies
21. A single slit of width 'd' is illuminated by monochromatic light of wavelength 'λ'. For diffraction to occur, the condition is: — d ≈ λ
22. The phenomenon of 'beats' is an example of: — Interference of sound
23. The frequency of amplitude variation (beats) is f_beat. The frequencies of the two sources are f1 and f2. Then: — f_beat = |f1 - f2|
24. If two tuning forks have frequencies f1 and f2, and f1 is slightly greater than f2, how many beats are heard per second? — f1 - f2
25. If two tuning forks of frequencies f1 and f2 are sounded together, the number of beats heard per second is given by: — f1 - f2
26. The phenomenon of beats is a direct consequence of which principle? — Principle of Superposition
27. When a tuning fork is loaded with a small piece of wax, its frequency: — Decreases
28. What phenomenon occurs when two sound waves of slightly different frequencies superpose? — Beats
29. When light passes through a narrow slit and spreads out, this phenomenon is known as: — Diffraction
30. The phenomenon where waves spread out from a point source is called: — Diffraction
31. The condition for observing significant diffraction of light through a single slit is that the width of the slit should be: — Comparable to the wavelength of light
32. Diffraction is most significant when the size of the obstacle or aperture is: — Comparable to the wavelength of the wave
33. If the wavelength of a wave is 500 nm and the size of the aperture is 1000 nm, diffraction will be: — Significant
34. Which phenomenon explains why we can hear a person talking around a corner? — Diffraction
35. The phenomenon of waves bending around obstacles or spreading out after passing through a narrow slit is called: — Diffraction
36. Which of the following phenomena demonstrates that light is a wave? — Diffraction
37. The bending of waves around the corners of an obstacle is a characteristic of: — Diffraction
38. Which of the following is NOT a basic wave phenomenon? — Beats
39. Which of the following is a consequence of the superposition principle? — Beats
40. The phenomenon of beats is specifically related to the superposition of waves with: — Nearly equal frequencies
41. Sound waves can be diffracted more easily than light waves because: — Sound waves have much larger wavelengths than light waves.
42. The phenomenon of diffraction is observed for: — All types of waves
43. The number of beats heard per second is equal to the: — Difference between the frequencies of the two sources
44. In the phenomenon of beats, the frequency of maximum loudness is equal to: — The difference between the two frequencies
45. What is the condition for observing beats from two sound sources? — The sources must have frequencies that differ by a small amount.
46. The time period of beats is the reciprocal of: — The difference of frequencies
47. When two waves of amplitudes A and 2A and frequencies f and 2f interfere, beats are observed. This statement is: — False, because frequencies are not close
48. The loudness of the sound in the phenomenon of beats varies periodically. This periodic variation in loudness is due to: — Variation in amplitude
49. Which of the following is a characteristic of diffraction? — Waves bend around obstacles or spread out after passing through an opening.
50. Which type of wave exhibits diffraction most prominently? — Waves with wavelengths comparable to the obstacle size
All One Line Questions
E-Book Beats and basic wave phenomena Online Test Beats and basic wave phenomena Question Bank Beats and basic wave phenomena