COMEDK · Physics · 16. Waves and Sound
Resonance is produced between a turning fork and a resonance column tube with upper end open and lower end closed by water surface. If the frequency of the tuning fork is 800Hz, and first two resonances are observed at lengths 9.75 cm, 31.25 cm, Find the length at which the third resonance occurs? Also find the speed of sound.
- A \(52.75\) cm and \(344\ ms^{-1}\)
- B \(43.10\) cm and \(340\ ms^{-1}\)
- C \(62.60\) cm and \(335\ ms^{-1}\)
- D \(31.25\) cm and \(330\ ms^{-1}\)
Answer & Solution
Correct Answer
(A) \(52.75\) cm and \(344\ ms^{-1}\)
Step-by-step Solution
Detailed explanation
Let \(L_1\), \(L_2\), and \(L_3\) be the lengths of the first, second, and third resonances respectively, and \(e\) be the end correction. The resonance lengths for a tube closed at one end are given by: \(L_1 + e = \dfrac{\lambda}{4}\) \(L_2 + e = \dfrac{3\lambda}{4}\)…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- In a Fraunhofer diffraction experiment at a single slit using a light of wavelength \(400 \mathrm{~nm}\), the first minimum is formed at an angle of \(30^{\circ}\). The direction \(\theta\) of the first secondary maximum is given byCOMEDK 2018 Medium
- A plot of kinetic energy of emitted photoelectrons from a metal versus the frequency of incident radiation gives a straight line, the intercept of which
A. Depends on the nature of the metal used
B. Depends on the intensity of radiation
C. Depends both on the intensity and the nature of metal used
D. Is a constant and is same for all metals which is independent of the intensity of Incident radiationCOMEDK 2025 Easy - The TV signals have a bandwidth of \(3.7 \mathrm{MHz}\). The number of TV channels that can be accommodated with a band of \(3700 \mathrm{GHz}\) isCOMEDK 2014 Medium
- The displacement of a wave is given by \(y=20 \cos (\omega t+4 z)\). The amplitude of the given wave isCOMEDK 2021 Medium
- The magnetic flux linked with a coil satisfies the relation \(\phi=\left(4 t^2+6 t+9\right) \mathrm{Wb}\), where \(t\) is time in second. The emf induced in the coil at \(t=2 \mathrm{~s}\) isCOMEDK 2023 Easy
- A compound slab is made of two parallel plates of copper and brass of the same thickness and having thermal conductivities in the ratio \(4: 1\). The free face of copper is at \(0^{\circ} \mathrm{C}\). The temperature of the interface is \(20^{\circ} \mathrm{C}\). What is the temperature of the free face of brass?COMEDK 2020 Hard
More PYQs from COMEDK
- Aluminium displaces hydrogen from dilute \(\mathrm{HCl}\), whereas silver does not. The emf of a cell prepared by combining \(\mathrm{Al} / \mathrm{Al}^{3+}\) and \(\mathrm{Ag} / \mathrm{Ag}^{+}\) is \(2.46 \mathrm{~V}\). The reduction potential of silver electrode is \(+0.80 \mathrm{~V}\). The reduction potential of aluminium electrode isCOMEDK 2016 Hard
- A galaxy moves with respect to the earth, so that sodium line of \(589.0 \mathrm{~nm}\) is observed at \(589.6 \mathrm{~nm}\). The speed of the galaxy isCOMEDK 2014 Medium
- Consider the following compounds
ethanamine (i); diethylamine (ii); aniline (iii) and \(N\) - methylbenzenamine (iv) The correct decreasing order of pKb values of the compounds is:COMEDK 2025 Medium - The volume of \(\mathrm{H}_{2}\) obtained at \(\mathrm{STP}\), when \(\mathrm{Mg}\) obtained by passing a current of \(0.5 \mathrm{~A}\) through molten \(\mathrm{MgCl}_{2}\) for \(32.2\) min is treated with excess of dilute HCl is approximately
[Equivalent mass of \(\mathrm{Mg}=12\) ]COMEDK 2012 Hard - Decomposition of benzene diazonium chloride by using \(\mathrm{Cu}_{2} \mathrm{Cl}_{2} / \mathrm{HCl}\) to form chlorobenzene isCOMEDK 2020 Medium
- When a charged particle moves perpendicular to a uniform magnetic field, thenCOMEDK 2016 Easy