AP EAMCET · PHYSICS · Waves and Sound
A sound source is moving towards a stationary listener with \(1 / 10\) th of the speed of sound. The ratio of apparent to real frequency is
- A \(\frac{10}{9}\)
- B \(\frac{11}{10}\)
- C \(\left(\frac{11}{10}\right)^2\)
- D \(\left(\frac{9}{10}\right)^2\)
Answer & Solution
Correct Answer
(A) \(\frac{10}{9}\)
Step-by-step Solution
Detailed explanation
Speed of sound source towards stationary observer \(v_s=\frac{v}{10}\) where, \(v\) is the speed of sound. \(\therefore\) Apparent frequency, \(f^{\prime}=\left(\frac{v}{v-v_s}\right) f\)…
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
- A coil of area is placed in a uniform magnetic field of lb. , with its plane perpendicular to the field. The coil rotates at a uniform rate to complete the revolution in . find the average emf . in the coil during intervals when the coil rotates from
i. to position
ii. to position
ii. to position
iv. to positionAP EAMCET 2020 Hard - The following statement is correct in the case of photoelectric effectAP EAMCET 2022 Easy
- A cylindrical well of radius \(2.5 \mathrm{~m}\) has water upto a height of \(14 \mathrm{~m}\) from the bottom. If the water level is at a depth of \(6 \mathrm{~m}\) from the top of the well, then the time taken (in minutes) to empty the well using a motor of \(10 \mathrm{HP}\) is approximately,
(Take, \(g=10 \mathrm{~ms}^{-2}\) )AP EAMCET 2019 Medium - Three Carnot engines operate in series between a heat source at temperature \(T_1\) and heat sink at a temperature \(T_4\). There are two other reservoirs at temperatures \(T_2\) and \(T_3\). The three engines are equally efficient, if (given that, \(\left.T_1>T_2>T_3>T_4\right)\)
AP EAMCET 2021 Hard - A capacitor of capacitance \(2 \mu \mathrm{~F}\) is charged with the help of a 60 V battery. After disconnecting the battery, if this capacitor is connected in parallel with another uncharged capacitor of capacitance \(1 \mu \mathrm{~F}\), then the potential difference across the plates of \(2 \mu \mathrm{~F}\) capacitor isAP EAMCET 2025 Medium
- Three moles of an ideal monoatomic gas undergoes a cyclic process as shown in the figure. The temperature of the gas in different states marked as 1, 2, 3 and 4 are \(400 \mathrm{~K}, 700 \mathrm{~K}, 2500 \mathrm{~K}\) and \(1100 \mathrm{~K}\) respectively. The work done by the gas during the process 1-2-3-4-1 is (universal gas constant is \(R\) )
AP EAMCET 2013 Medium
More PYQs from AP EAMCET
- If thenAP EAMCET 2021 Medium
- According to zeroth law of thermodynamics, the physical quantity which is same for two bodies in thermal equilibrium isAP EAMCET 2025 Easy
- At \(\mathrm{T}(\mathrm{K})\) two liquids A and B form an ideal solution. The vapour pressures of pure liquids A and B at that temperature are 400 and 600 mm Hg respectively. If the mole fraction of liquid \(B\) is 0.3 in the mixture, the mole fractions of \(A\) and \(B\) in vapour phase respectively areAP EAMCET 2024 Easy
- If \(X\) is a Poisson variate with mean 2, then \(P\left(X>\frac{3}{2}\right)=\)AP EAMCET 2017 Easy
- A bag \(X\) contains 2 white and 3 black balls and another bag \(Y\) contains 4 white and 2 black balls. One bag is selected at random and a ball is drawn from it. Then, the probability for the ball chosen be white, is :AP EAMCET 2003 Medium
- Geometric mean of \(\tan 1^{\circ}, \tan 2^{\circ}, \ldots \ldots . . .\), \(\tan 89^{\circ}\) isAP EAMCET 2020 Easy