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Superposition of Waves-2 : Stationary (Standing) Waves : Vibration of Air Columns — Important Questions

ICSE · Class 11 · Physics

52 important questions from Superposition of Waves-2 : Stationary (Standing) Waves : Vibration of Air Columns for ICSE Class 11 Physics, with answers.

52 questions34 flashcards12 formulas & key relations5 concepts

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Illustrates a transverse wave pulse traveling along a string and reflecting from a free end. The reflected pulse is shown with no phase change (not inverted) compared to the incident pulse.
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52 Questions·
multiple choicemultiple correct

Important Questions from Superposition of Waves-2 : Stationary (Standing) Waves : Vibration of Air Columns

1multiple choice
3 marks

A closed pipe has length 0.60 m and radius 0.05 m. If the speed of sound is 340 m/s, what is its fundamental frequency using end correction?

Show answer

132.8 Hz

For a closed pipe with end correction, n1 = v / 4(l + 0.6r). Here 0.6r = 0.6 × 0.05 = 0.03 m. Effective length = 0.60 + 0.03 = 0.63 m. So n1 = 340 / (4 × 0.63) = 340 / 2.52 ≈ 132.8 Hz.

2multiple choice
3 marks

A closed pipe has length 0.50 m and speed of sound 340 m/s. What is the difference between its first and second harmonic frequencies?

Show answer

340 Hz

For a closed pipe, consecutive harmonics differ by Δn = 2n1 = 2v / 4l. So Δn = 2 × 340 / (4 × 0.50) = 680 / 2 = 340 Hz.

3multiple choice
3 marks

A tuning fork of frequency 256 Hz is used in a resonance tube. If the first resonance length is 0.30 m, what is the second resonance length neglecting end correction?

Show answer

0.90 m

For a resonance tube, l1 = λ/4 and l2 = 3λ/4. So l2 = 3l1. If l1 = 0.30 m, then l2 = 0.90 m.

4multiple choice
3 marks

A tuning fork of frequency 400 Hz produces first and second resonance lengths of 0.21 m and 0.63 m in a resonance tube. What is the wavelength of sound?

Show answer

0.84 m

Use λ = 2(l2 - l1). Here l2 - l1 = 0.63 - 0.21 = 0.42 m. So λ = 2 × 0.42 = 0.84 m.

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What are the important topics in Superposition of Waves-2 : Stationary (Standing) Waves : Vibration of Air Columns for ICSE Class 11 Physics?
Key topics in Superposition of Waves-2 : Stationary (Standing) Waves : Vibration of Air Columns include Bounded Medium and Reflection of Waves, Stationary Waves: Formation and Properties, Closed Organ Pipe, Open Organ Pipe. Study these first, then practise questions on each for Class 11 exams.
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Super Tutor has 52 practice questions for Superposition of Waves-2 : Stationary (Standing) Waves : Vibration of Air Columns, including multiple choice, multiple correct questions. A sample with answers is on this page.

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