# Standing Waves on a String (MCQs)

The Multiple Choice Questions On Standing Waves on a String are as follows:

01. Air Column Closed at one end: When an air column is vibrating with the formation of three nodes and three anti-nodes, then it is known as ______ harmonic.

02. When a body is displaced from its equilibrium position and released, it makes oscillation due to restoring force. Such vibrations are call _____ vibrations

03. Find Odd one out: Conditions for formation of Stationary Waves: Two simple harmonic harmonic progressive waves should have
same amplitude
same period
same wavelength
same frequency
same speed
same same medium
same same path
same directions

04. Air Column Open at Both Ends: When an air column is vibrating with the formation of two anti-nodes at both the open ends and one node inside the tube, it is known as _____ harmonic.

05. The string can vibrate in a number of ways, with different frequencies called _____ of vibration

06. The direction of vibrations of particles in Stationary waves along a string is ________ to string

07. When a stretched string vibrates with three loops (p = 3), then this mode of vibration is called ________ Overtone or _______ Harmonic

08. In Stationary waves along a string, at nodes, particles of string vibrate with _____ amplitude

09. True or False: Stationary waves transfer energy along the string.

10. Fundamental frequency and its multiples are called ______

11. In a stationary waves, distance between successive nodes is ________

12. The anti-node of vibrations in air-column is not found exactly at the open end. It is formed a little distance above the open end. This distance is called ____________

13. Stationary waves are ______ in space and time.

14. In a stationary wave on a string, all particles in one loop and an adjacent loop are in phase.

15. In a stationary waves, pressure changes are _______ at displacement nodes.

16. The ratio of density of substance to density of water is called _________

18. The vibrations of a body under the action of external periodic force, in which the body vibrates with frequency equal to frequency of external periodic force (driving frequency) other than natural frequency of the body, are called _________

19. For pipe closed at one end, end correction (e) = ____ x d, where d = inner diameter of tube
(a) 0.1
(b) 0.3
(c) 0.9
(d) 2.0

20. When a stretched string vibrates with _____ loop, then this mode of vibration is called fundamental mode.

21. Musical Instrument, where Sound is produced by setting vibrations in stretched membrane is called _______

22. Air Column Closed at one end: When an air column is vibrating with the formation of one node at the closed end and one anti-node at the open end, it is known as ____ harmonic.

23. Soldiers marching marching over a suspension bridge are ordered to break their rhythm due to _______

24. What are stationary or standing waves?

25. In a stationary waves, displacement nodes are _______ anti-nodes

26. Air Column Open at Both Ends: When an air column is vibrating with the formation of ____ anti-nodes and _____ nodes, then it is known as second overtone or third harmonic.

27. Name the phenomenon: If a body is made to vibrate by an external periodic force, with a frequency which is same as the natural frequency of the body, the body begins to vibrate with a very large amplitude.

28. The integral multiple of the fundamental frequency including fundamental frequency are called _______

29. Air Column Closed at one end: When an air column is vibrating with the formation of two nodes and two anti-nodes, then it is known as ____ overtone or _____ harmonic.

30. The integral multiple of the fundamental frequency excluding fundamental frequency, which are actually present are called ________

## Answers: Standing Waves on a String

01. fifth
02. Free or Natural
03. same directions {They should travel in opposite directions}
04. first
05. modes
06. perpendicular
07. Second Overtone or Third Harmonic
08. Zero
09. False {they do not transfer energy}
10. Harmonics
11. λ/2
12. end correction
13. periodic
14. False {all particles in one loop are in phase, while those in adjacent loop are out of phase}
15. maximum
16. Specific Gravity or Relative Density (σ)
17. Resonance
18. forced vibrations
19. (b) 0.3
20. one
21. Percussion instruments
22. first
23. Effect of Resonance
24. When two identical simple harmonic progressive waves having same amplitude, period, wave length and speed traveling in the same medium, along the same straight line but opposite in direction, produce interference, the resultant wave which is formed does not travel either in forward direction or in backward direction, but remain stationary. These waves are called stationary or standing waves.
25. pressure
26. four anti-nodes and three nodes
27. Resonance
28. harmonics
29. first overtone or third harmonic.
30. overtones