A source and an observer are moving towards each other with a speed equal to $\frac{v}{2}$ where $v$ is the speed of sound. The source is emitting sound of frequency $n$. The frequency heard by the observer will be
Medium
Download our app for free and get started
(d)$n' = n\left( {\frac{{v + {v_0}}}{{v - {v_s}}}} \right) = n\,\left( {\frac{{v + v/2}}{{v - v/2}}} \right) = 3n$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1If $V_m$ is the velocity of sound in moist air, $V_d$ is the velocity of sound in dry air, under identical conditions of pressure and temperatureView Solution
- 2View SolutionWhich of the following is different from others
- 3Two open organ pipes of fundamental frequencies $n_{1}$ and $n_{2}$ are joined in series. The fundamental frequecny of the new pipe so obtained will beView Solution
- 4A source is moving towards an observer with a speed of $20 m/s$ and having frequency of $240 Hz.$ The observer is now moving towards the source with a speed of $20 m/s$. Apparent frequency heard by observer, if velocity of sound is $340 m/s$, is ... $Hz$View Solution
- 5Length of a string tied to two rigid supports is $40 cm$. Maximum length (wavelength in $cm$) of a stationary wave produced on it is ... $cm$View Solution
- 6The correct figure that shows, schematically, the wave pattern produced by superposition of two waves of frequencies $9\,Hz$ and $11\,Hz,$View Solution
- 7First overtone frequency of a closed organ pipe is equal to the first overtone frequency of an open organ pipe. Further nth harmonic of closed organ pipe is also equal to the mth harmonic of open pipe, where $n$ and $m$ are:View Solution
- 8A source of sound emits $200\pi W$ power which is uniformly distributed over a sphere of $10 m$ radius. What is the loudness of sound on the surface of a sphereView Solution
- 9Two similar sonometer wires given fundamental frequencies of $500Hz$. These have same tensions. By what amount the tension be increased in one wire so that the two wires produce $5$ beats/sec .... $\%$View Solution
- 10Two sound waves of slightly different frequencies have amplitude ratio $\frac{11}{9} .$ What is the difference of sound levels in decibels of maximum and minimum intensities heard at a point :- ............. $\mathrm{dB}$View Solution