AP EAMCET · PHYSICS · Waves and Sound
The speed of a stationary wave represented by the equation \(y=0.7 \sin \left(\frac{7 \pi}{4} x\right) \cos (350 \pi t)\) is
(In the given equation \(x\) and \(y\) are in metre and \(t\) is in second)
- A \(100 \mathrm{~m} \mathrm{~s}^{-1}\)
- B \(150 \mathrm{~m} \mathrm{~s}^{-1}\)
- C \(160 \mathrm{~m} \mathrm{~s}^{-1}\)
- D \(200 \mathrm{~m} \mathrm{~s}^{-1}\)
Answer & Solution
Correct Answer
(D) \(200 \mathrm{~m} \mathrm{~s}^{-1}\)
Step-by-step Solution
Detailed explanation
\(k = \frac{7 \pi}{4}\) \(\omega = 350 \pi\) \(v = \frac{\omega}{k} = \frac{350 \pi}{\frac{7 \pi}{4}} = 200 \mathrm{~m} \mathrm{~s}^{-1}\)
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
- The maximum potential energy due to electrostatic repulsion between two hydrogen nuclei is nearly (radius of the nucleus
\[
=1.1 \text { fermi })\left[\frac{1}{4 \pi \varepsilon_0}=9 \times 10^9 \mathrm{Nm}^2 \mathrm{C}^{-2}\right]
\]AP EAMCET 2018 Easy - The sum of two point positive charges separated by a distance of 1.5 m in air is \(25 \mu \mathrm{C}\). If the electrostatic force between the two charges is 0.6 N, then the difference between the two charges isAP EAMCET 2025 Medium
- A light container having a diatomic gas enclosed within is moving with velocity \(v\). Mass of the gas is \(M\) and number of moles is \(n\). The kinetic energy of gas w.r.t. ground isAP EAMCET 2020 Medium
- A toroid of \(n\) turns, mean radius \(R\) and cross-sectional radius a carries current \(I\). It is placed on a horizontal table taken as \(x y\)-plane. Its magnetic moment \(m\)AP EAMCET 2021 Easy
- When electron in hydrogen atom jumps to the inner most orbit, the radiation emitted belongs to which one of the following series?AP EAMCET 2021 Easy
- Threshold frequency for photoelectric effect on sodium corresponds to a wavelength \(5000 Å\). Its work function isAP EAMCET 2020 Medium
More PYQs from AP EAMCET
- The largest among the distances from the point \(P(15,9)\) to the points on the circle \(x^2+y^2-6 x-8 y-11=0\) isAP EAMCET 2024 Easy
- A metal surface is illuminated by a light of given intensity and frequency to cause photoemission. If the intensity of illumination is reduced to one-fourth of its original value, then the maximum kinetic energy of the emitted photoelectrons would becomeAP EAMCET 2020 Medium
- Identify correct statements from the following:
i. \(\mathrm{H}_3 \mathrm{BO}_3\) is a monobasic acid.
ii. The correct formula of borax is \(\mathrm{Na}_2\left[\mathrm{~B}_4 \mathrm{O}_5(\mathrm{OH})_3\right] 8 \mathrm{H}_2 \mathrm{O}\).
iii. \(\mathrm{NaBH}_4\) is a reducing agent.AP EAMCET 2019 Easy - The amplitude of the electric field in a parallel beam of plane electromagnetic waves of intensity is
(Permittivity of free space )AP EAMCET 2019 Easy - The image of the line \(x+y-2=0\) in the \(y\)-axis isAP EAMCET 2010 Easy
- Match the following
List-I (Compound) List-II (Use) A) Kieselghur I) Chromatographic material B) Silica gel II) Softening of hard water C) ZSM-5 III) Filtration plants D) Hydrated zeolites IV) To convert alcohol directly into gasoline AP EAMCET 2025 Medium