Q13.A cylindrical tube, open at both ends, has a fundamental frequency, f , in air. The tube is dipped vertically in water so that half of it is in water. The fundamental frequency of the air-column is now (1) f (2) f 2 (3) 3f (4) 2f 4
What This Question Tests
This question requires calculating the fundamental frequency of an open pipe and then a closed pipe (formed by dipping in water) of half the original length.
Concepts Tested
Formulas Used
f_open = v/(2L)
f_closed = v/(4L')
📚 NCERT Sections This Tests
14.6 — Reflection Of Waves
Physics Class 12 · Chapter 14
14.6 Reflection of waves some cork pieces on the disturbed surface, it is seen that
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.
10.1 — Monochromatic Light Of Wavelength 589 Nm Is Incident From Air On A
Physics Class 12 · Chapter 10
10.1 Monochromatic light of wavelength 589 nm is incident from air on a water surface. What are the wavelength, frequency and speed of (a) reflected, and (b) refracted light? Refractive index of water is 1.33.
📋 Question Details
- Chapter
- Waves & Sound
- Topic
- Organ pipes, Standing waves
- Year
- 2012
- Shift
- Offline
- Q Number
- Q13
- Type
- MCQ
- NCERT Ref
- Class 11 Physics Ch 15: Waves
More from this Chapter
Q38.Tube A has both ends open while tube B has one end closed, otherwise they are identical. The ratio of fundamental frequency of tube A and B is (1) 1 : 2 (2) 1 : 4 (3) 2 : 1 (4) 4 : 1
Q39.A tuning fork arrangement (pair) produces 4 beats / sec with one fork of frequency 288cps. A little wax is placed on the unknown fork and it then produces 2 beats /sec. The frequency of the unknown fork is (1) 286 cps (2) 292 cps (3) 294 cps (4) 288 cps
Q40.A wave y = a sin(ωt −kx) on a string meets with another wave producing a node at x = 0. Then the equation of the unknown wave is (1) y = a sin(ωt + kx) (2) y = −a sin(ωt + kx) (3) y = a sin(ωt −kx) (4) y = −a sin(ωt −kx)
Q41.When temperature increases, the frequency of a tuning fork (1) increases (2) decreases (3) remains same (4) increases or decreases depending on the material