Q25.A wire having a linear mass density 9. 0 × 10−4 kg m−1 is stretched between two rigid supports with a tension of 900 N. The wire resonates at a frequency of 500 Hz. The next higher frequency at which the same wire resonates is 550 Hz. The length of the wire is ___________ m.
What This Question Tests
This question involves determining the length of a string by using the relationship between consecutive resonant frequencies and the wave speed, which depends on tension and linear mass density.
Concepts Tested
Formulas Used
v = √(T/μ)
f_n = (nv) / (2L)
f_n+1 - f_n = v / (2L)
📚 NCERT Sections This Tests
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
10.5 — In Young’S Double-Slit Experiment Using Monochromatic Light Of
Physics Class 12 · Chapter 10
10.5 In Young’s double-slit experiment using monochromatic light of wavelength l, the intensity of light at a point on the screen where path difference is l, is K units. What is the intensity of light at a point where path difference is l/3?
10.4 — In A Young’S Double-Slit Experiment, The Slits Are Separated By
Physics Class 12 · Chapter 10
10.4 In a Young’s double-slit experiment, the slits are separated by 0.28 mm and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 1.2 cm. Determine the wavelength of light used in the experiment.
📋 Question Details
- Chapter
- Waves & Sound
- Topic
- Standing waves in a stretched string
- Year
- 2021
- Shift
- 31 Aug Shift 1
- Q Number
- Q25
- Type
- Numerical
- NCERT Ref
- Class 11 Physics Ch 15: Waves
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