Principle of superposition, reflection of waves, standing waves in strings and organ pipes, fundamental mode and harmonics, beats - Question Bank
1. In an organ pipe open at both ends, if the fundamental frequency is 100 Hz, what is the frequency of the second overtone?
2. A standing wave is formed on a string of length L. If the string vibrates in 3 segments (3 antinodes), what is the wavelength?
3. What is the condition for resonance in an organ pipe?
4. When two waves of amplitudes A1 and A2 interfere, the resultant amplitude R depends on their phase difference φ. The formula for R^2 is:
5. A tuning fork of frequency 440 Hz is sounded with another tuning fork. 4 beats are heard per second. If the frequency of the unknown tuning fork is slightly increased, and the beat frequency becomes 5 per second, what was the original frequency of the unknown tuning fork?
6. A tuning fork of frequency 440 Hz is sounded with another tuning fork. 4 beats are heard per second. The frequency of the second tuning fork could be:
7. Beats are perceived as periodic variations in:
8. To produce beats, the frequencies of the two waves must be:
9. If two sound waves have frequencies f1 and f2 (f1 > f2), the beat frequency is:
10. The number of beats heard per second is equal to the:
11. Beats are produced when two sound waves of slightly different frequencies interfere. This phenomenon is known as:
12. In an organ pipe closed at one end, the first overtone corresponds to the:
13. In an organ pipe open at both ends, the first overtone corresponds to the:
14. In a string fixed at both ends, the first overtone corresponds to the:
15. What are overtones in the context of standing waves?
16. If the fundamental frequency of an organ pipe closed at one end is f0, the frequency of the third harmonic (which is the second overtone) is:
17. The frequencies of vibration for an organ pipe closed at one end are:
18. For an organ pipe closed at one end, the condition for standing waves is:
19. In an organ pipe closed at one end, what must be present at the open end and the closed end, respectively?
20. The frequencies of vibration for an organ pipe open at both ends are:
21. For an organ pipe open at both ends, the condition for standing waves is:
22. In an organ pipe open at both ends, what must be present at the ends?
23. Harmonics are integer multiples of the fundamental frequency. This applies to:
24. If the fundamental frequency of a string is f0, the frequency of the third harmonic is:
25. If the fundamental frequency of a string is f0, the frequency of the second harmonic is:
26. For a string of length L fixed at both ends, the frequency of the nth harmonic is given by:
27. The frequency of the fundamental mode is also known as the:
28. In the fundamental mode of vibration of a string fixed at both ends, how many antinodes are present?
29. The lowest frequency of vibration of a string fixed at both ends is called the:
30. In a string fixed at both ends, the ends must be:
31. For a string of length L fixed at both ends, what is the condition for the formation of standing waves?
32. What is the distance between a node and an adjacent antinode in a standing wave?
33. What is the distance between two consecutive antinodes in a standing wave?
34. What is the distance between two consecutive nodes in a standing wave?
35. In a standing wave, points of maximum displacement are called:
36. In a standing wave, points of minimum displacement are called:
37. What are standing waves?
38. A wave traveling in a denser medium strikes a rarer medium at its boundary. What type of reflection occurs?
39. A wave traveling in a rarer medium strikes a denser medium at its boundary. What type of reflection occurs?
40. When a wave is reflected from a free boundary, what happens to its phase?
41. When a wave is reflected from a rigid boundary, what happens to its phase?
42. According to the law of reflection, the angle of incidence is equal to the:
43. When a wave encounters a boundary, it bounces back into the same medium. This phenomenon is called:
44. If two waves with amplitudes A1 and A2 interfere destructively, what is the minimum possible amplitude of the resultant wave?
45. If two waves with amplitudes A1 and A2 interfere constructively, what is the maximum possible amplitude of the resultant wave?
46. Destructive interference occurs when two waves meet with displacements in opposite directions. What is the condition for destructive interference?
47. Constructive interference occurs when two waves meet with displacements in the same direction. What is the condition for constructive interference?
48. When two waves meet at a point, the resultant displacement is equal to the algebraic sum of the displacements due to each wave individually. This statement describes which principle?
49. What is the principle of superposition for waves?