Standing Waves on a String | Concept, Formulas, Derivation, Solved Numericals |

In this lecture, we discuss Standing waves on a String.. the Concept, Formulas, Derivation, Solved Numericals. Maharshtra Board Class 12 (11th) Physics textbook has being referred in this lecture.
Find below time stamp and numericals discussed here.
TIMESTAMP
00:00 #14
02:12 DERIVATIONS
16:08 #14(cont)
19:15 #19
21:55 #20
24:03 #23
26:00 #24

@ 27:30 A plectrum is a small flat tool used to pluck or strum a stringed instrument. The plectrum is often called a pick - held in the player's hand.

✅ In this video,
✔️ Class: 12th
✔️ Subject: Physics
✔️ Chapter: Stationery Waves | Waves on a string
✔️ Topic Name: Stationery Waves | Waves on a string
✔️ Boards: CBSE, Maharashtra, IB

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14. Two wires of the same material and same cross section are stretched on a sonometer. One wire is loaded with 1.5 kg and another is loaded with 6 kg. The vibrating length of first wire is 60 cm and its fundamental frequency of vibration is the same as that of the second wire. Calculate vibrating length of the other wire.
[Ans: 1.2 m]

15. A pipe closed at one end can produce overtones at frequencies 640 Hz, 896 Hz and 1152 Hz. Calculate the fundamental frequency.
[Ans: 128 Hz]

16. A standing wave is produced in a tube open at both ends. The fundamental frequency is 300 Hz. What is the length of tube? (speed of the sound = 340 m s'). [Ans: 0.57 m]

17. Find the fundamental, first overtone and second overtone frequencies of a pipe, open at both the ends, of length 25 cm if the speed of sound in air is 330 m/s. [Ans: 660 Hz, 1320 Hz, 1980 Hz]

18. A pipe open at both the ends has a fundamental frequency of 600 Hz. The first overtone of a pipe closed at one end has the same frequency as the first overtone of the open pipe. How long are the two pipes? [Ans : 27.5 an, 20.625 cm]

19. A string 1m long is fixed at one end. The other end is moved up and down with frequency 15 Hz. Due to this, a stationary wave with four complete loops, gets produced on the string. Find the speed of the progressive wave which produces the stationary wave.[Hint: Remember that the moving end is an antinode.] [Ans: 6.67 m

20. A violin string vibrates with fundamental frequency of 440Hz. What are the frequencies of first and second overtones? [Ans: 880 Hz, 1320 Hz]

21. A set of 8 tuning forks is arranged in a series of increasing order of frequencies. Each fork gives 4 beats per second with the next one and the frequency of last fork is twice that of the first. Calculate the frequencies of the first and the last fork. [Ans: 28 Hz, 56 Hz]

22. A sonometer wire is stretched by tension of 40 N. It vibrates in unison with a tuning fork of frequency 384 Hz. How many numbers of beats get produced in two seconds if the tension in the wire is decreased by 1.24 N? [Ans: 12 beats]

23. A sonometer wire of length 0.5 m is stretched by a weight of 5 kg. The fundamental frequency of vibration is 100 Hz. Calculate linear density of wire. [Ans: 4.9.10' kg/m]

24. The string of a guitar is 80 cm long and has a fundamental frequency of 112 Hz. If a guitarist wishes to produce a frequency of 160 Hz, where should the person press the string? [Ans : 56 cm]

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Disclaimer:
📝📝📝 While I have taken care to ensure the accuracy of the information presented, this channel assumes no responsibility or liability for any errors or omissions. You are requested to consult standard textbooks in case of any confusion.
Thank you.

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