TS EAMCET · Physics · Waves and Sound
A car is moving with a speed of \(72 \mathrm{~km} / \mathrm{h}\) towards a hill. Car blows horn at a distance of \(1800 \mathrm{~m}\) from the hill. If echo is heard after \(10 \mathrm{~s}\), the speed of sound (in \(\mathrm{m} / \mathrm{s}\) ) is
- A \(300\)
- B \(320\)
- C \(340\)
- D \(360\)
Answer & Solution
Correct Answer
(C) \(340\)
Step-by-step Solution
Detailed explanation
The speed of the car is \(72 \mathrm{~km} / \mathrm{h}\) \[ =72 \times \frac{5}{18}=20 \mathrm{~m} / \mathrm{s} \] The distance travelled by car in \(10 \mathrm{~s}\) \[ =10 \times 20=200 \mathrm{~m} \] Hence, the distance travelled by sound in reaching the hill and coming back…
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 binding energy of whose atomic mass is Mass of proton Mass of neutron (Neglect the electron mass) (Assume )TS EAMCET 2020 Easy
- Monochromatic light of wavelength \(6000 Å\) incidents on a small angled prism. If the angle of the prism is \(6^{\circ}\), the refractive indices of the material of the prism for violet and red lights are respectively 1.52 and 1.48, then the angle of dispersion produced for this incident light isTS EAMCET 2025 Medium
- A hollow spherical shell of radius \(r\) has a uniform charge density \(\sigma\). It is kept in a cube of edge \(3 r\) such that the centres of the cube and the shell coincide. Then the electric flux coming out of one face of a cube is ( \(\varepsilon_0\) - permittivity of free space)TS EAMCET 2023 Medium
- The power factor of an \(\mathrm{AC}\) circuit containing peak current \(2 \mathrm{~A}\) and peak voltage \(1 \mathrm{~V}\) is \(1 / 2\), then the angle between voltage and current isTS EAMCET 2023 Medium
- The sensitivity of a galvanometer is 60 division/A. When a shunt is used, its sensitivity becomes 10 division/A. If the galvanometer is of resistance \(20 \Omega\), the value of shunt used isTS EAMCET 2011 Medium
- In hydrogen atom spectra, if the ratio of wavelengths corresponding to the first of Lyman series and the first line of Balmer series is \(9 \alpha\), the value of \(\alpha\) isTS EAMCET 2021 Easy
More PYQs from TS EAMCET
- A lens is made of glass having an index of refraction . One side of the lens is flat and the other side is convex with a radius . If an object is placed , towards the convex side of the lens, the image is formed at on the other side of the lens. The value of is
TS EAMCET 2022 Medium - When a vibrating tuning fork is placed on a sound box of a sonometer, 8 beats per second are heard when the length of the sonometer wire is kept at \(101 \mathrm{~cm}\) or \(100 \mathrm{~cm}\). Then the frequency of the tuning fork is (Consider that the tension in the wire is kept constant)TS EAMCET 2012 Easy
- A capacitor of capacity \(0.1 \mu \mathrm{F}\) connected in series to a resistor of \(10 \mathrm{M} \Omega\) is charged to a certain potential and then made to discharge through the resistor. The time in which the potential will take to fall to half its original value is (Given, \(\log _{10} 2=0.3010\) )TS EAMCET 2010 Hard
- For the circuit shown in the figure, calculate the resistance between the points \(A\) and \(\mathrm{B}\).
TS EAMCET 2019 Medium - Assume proton is rotating along a circular path of radius \(1 \mathrm{~m}\) under a centrifugal force of \(4 \times 10^{-12} \mathrm{~N}\). If the mass of proton is \(1.6 \times 10^{-27} \mathrm{~kg}\), then its angular velocity of rotation isTS EAMCET 2020 Easy
- Let \(\mathbf{A}_1+\mathbf{A}_2=5 \mathbf{A}_3, \mathbf{A}_1-\mathbf{A}_2=3 \mathbf{A}_3\), \(\mathbf{A}_3=2 \hat{\mathbf{i}}+4 \hat{\mathbf{j}}\), then \(\frac{\left|\mathbf{A}_1\right|}{\left|\mathbf{A}_2\right|} \mathrm{i}\)TS EAMCET 2020 Easy