TS EAMCET · Physics · Waves and Sound
A whistle of frequency \(660 \mathrm{~Hz}\) moves in a circle of radius \(1 \mathrm{~m}\) at an angular speed of \(10 \mathrm{rad} / \mathrm{s}\). The highest frequency heard by a listener at a long distance and at rest with respect to the center of the circle is (Let speed of sound \(=340 \mathrm{~m} / \mathrm{s}\).)
- A \(700 \mathrm{~Hz}\)
- B \(640 \mathrm{~Hz}\)
- C \(720 \mathrm{~Hz}\)
- D \(680 \mathrm{~Hz}\)
Answer & Solution
Correct Answer
(D) \(680 \mathrm{~Hz}\)
Step-by-step Solution
Detailed explanation
Given, frequency whistle \(f_0=660 \mathrm{~Hz}\), speed of sound \(=340 \mathrm{~m} / \mathrm{s}\) angular speed of whistle, \(\omega=10 \mathrm{rad} / \mathrm{s}\) and radius of circle, \(r=1 \mathrm{~m}\). Since, we know that the maximum frequency heard by listener, if…
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
- What is the change in mass of a body, when taken below the surface of the earth? [Take radius of the earth as ]TS EAMCET 2021 Medium
- A body of mass \(2.4 \mathrm{~kg}\) is subjected to a force which varies with distance as shown in figure. The body starts from rest at \(x=0\). Its velocity at \(x=9 \mathrm{~m}\) is
TS EAMCET 2015 Medium - A \(4 \mu \mathrm{F}\) capacitor is charged by a \(200 \mathrm{~V}\) battery. It is then disconnected from the supply and is connected to another uncharged \(2 \mu \mathrm{F}\) capacitor. During the process, loss of energy (in \(\mathrm{J}\) ) isTS EAMCET 2005 Medium
- In the Carnot engine when the heat is taken from the source, then the temperature of the sourceTS EAMCET 2020 Easy
- A long straight rod of diameter 4 mm carries a steady current ' \(i\) '. The current is uniformly distributed across its cross-section. The ratio of the magnetic fields at distances 1 mm and 4 mm from the axis of the rod isTS EAMCET 2024 Easy
- A particle is executing simple harmonic motion (S.H.M.). Its acceleration at a distance of from the mean position is If its velocity is when it is at a distance of from its mean position, then the amplitude of S.H.M. is,TS EAMCET 2021 Hard
More PYQs from TS EAMCET
- If a nucleus P converts into a nucleus Q by the decay of one alpha particle and two \(\beta^{-}\) particles, then the nuclei \(P\) and \(Q\) areTS EAMCET 2025 Easy
- A closely wound solenoid of \(80 \mathrm{~cm}\) long has 5 layers of windings of 400 turns each. The diameter of the solenoid is \(1.8 \mathrm{~cm}\). If the current carried is \(8 \mathrm{~A}\), then the magnitude of the magnetic field inside the solenoid near its centre is approximatelyTS EAMCET 2023 Medium
- Consider a current carrying wire shown in the figure. If the radius of the curved part of the wire is \(R\) and the linear parts are assumed to be very long, then the magnetic induction of the field at the point \(O\) is
TS EAMCET 2018 Easy - Latent heat of vaporisation of water is . The amount of heat needed to convert of water into vapour at isTS EAMCET 2020 Easy
- A point charge of is placed in the plane at a location with radius vector The electric field strength and its magnitude at a point with radius vector isTS EAMCET 2018 Medium
- A meniscus drop of radius \(1 \mathrm{~cm}\) is sprayed into \(10^6\) droplets of equal size. Calculate the energy expended if surface tension of mercury is \(435 \times 10^{-3} \mathrm{~N} / \mathrm{m}\).TS EAMCET 2020 Easy