Home
Class 11
PHYSICS
A source of sound and detector are arran...


A source of sound and detector are arranged as shown in Fig. The detector is moving along a circle with constant angular speed `omega`. It start from the shown location in anticlockwise direction at `t=0`
(Take velocity of sound in air as v)
What is the frequency as received by detector, when it rotates by an angle `(pi)/(2)`?

A

f

B

`(v-omegaR)/(v)xxf`

C

`(v-(omega)/( R))/(v)xxf`

D

`v-(omegaRxx(2)/(sqrt5))/(v)xxf`

Text Solution

Verified by Experts

The correct Answer is:
D

The location of detector at required instant is shown in Fig.
We have, `v_0=Romega`
`f_(ap)=(v-v_0costheta)/(v)xxf`
`costheta=(2R)/(sqrt(5)R)`
`f_(ap)=(v-omegaRxx(2)/(sqrt5))/(v)xxf`
Promotional Banner

Topper's Solved these Questions

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Integer|16 Videos

  • SOUND WAVES AND DOPPLER EFFECT

    CENGAGE PHYSICS|Exercise Assertion-Reasoning|24 Videos

  • RIGID BODY DYNAMICS 2

    CENGAGE PHYSICS|Exercise Interger|2 Videos

  • SUPERPOSITION AND STANDING WAVES

    CENGAGE PHYSICS|Exercise Comprehension Type|5 Videos

Similar Questions

Explore conceptually related problems

A source of sound and detector are arranged as shown in Fig. The detector is moving along a circle with constant angular speed omega . It start from the shown location in anticlockwise direction at t=0 (Take velocity of sound in air as v) Find the time interval between minimum and maximum frequency as received by the detector.

A source of sound and detector are arranged as shown in Fig. The detector is moving along a circle with constant angular speed omega . It start from the shown location in anticlockwise direction at t=0 (Take velocity of sound in air as v) Q. Find the time at which the detector will hear the maximum frequency for the first time.

A source of sound and detector are moving as shown in Fig. at t=0 . Take velocity of sound wave to be v . For this situation mark out the correct statement(s).

An electron is at P t = 0 It is circulating in anticlockwise direction with a constant angular speed omega along the shown circular path. Magnetic field at Q(CQ = 2R , where R is radius of the circular) will be recorded as zero at times)

A stationary sound sound 's' of frequency 334 Hz and a stationary ovserver 'O' are placed near a reflecting suface moving away from the source with velocity 2 m/s as shown in the figure. If the velocity of the sound waves is air is v= 330 m/s the apparent frequency of the echo is

A source of sound and a detector are placed at the same place on ground At t=0 , the source S is projected towards reflector with velocity v_0 in vertical upward directon and reflector starts moving down with constant velocity v_0 At t-0 , the vertical separation between the reflector and source is H((gtv_0^2)/(2g)) . The speed of sound in air is v(gtgtv_0) , Take f_0 as the frequency of sound waves emitted by source. Based on above information answer the following questions. Q. Frequency of sound received by detector after being reflected by reflector at t=(v_0)/(2g) is

A source of sound and a detector are placed at the same place on ground At t=0 , the source S is projected towards reflector with velocity v_0 in vertical upward directon and reflector starts moving down with constant velocity v_0 At t-0 , the vertical separation between the reflector and source is H((gtv_0^2)/(2g)) . The speed of sound in air is v(gtgtv_0) , Take f_0 as the frequency of sound waves emitted by source. Based on above information answer the following questions. Q. Wavelength of sound waves as received by detector before reflection at t=(v_0)/(2g) is

A source of sound emitting a 1200 Hz note travels along a straight line at a speed of 170 m s^-1 . A detector is placed at a distance of 200 m from the line of motion of the source. (a) Find the frequency of sound received by the detector at the instant when the source gets closest to it. (b) Find the distance between the source and the detector at the instant it detects the frequency 1200 Hz. Velocity of sound in air = 340 m s^-1 .

CENGAGE PHYSICS-SOUND WAVES AND DOPPLER EFFECT-Comprehension
  1. In the figure shown below, a source of sound having power 12xx10^-6W i...

    Text Solution

    |

  2. In the figure shown below, a source of sound having power 12xx10^-6W i...

    Text Solution

    |

  3. In the figure shown below, a source of sound having power 12xx10^-6W i...

    Text Solution

    |

  4. When a sound wave enters the ear, it sets the eardrum into oscillation...

    Text Solution

    |

  5. When a sound wave enters the ear, it sets the eardrum into oscillation...

    Text Solution

    |

  6. When a sound wave enters the ear, it sets the eardrum into oscillation...

    Text Solution

    |

  7. When a sound wave enters the ear, it sets the eardrum into oscillation...

    Text Solution

    |

  8. When a sound wave enters the ear, it sets the eardrum into oscillation...

    Text Solution

    |

  9. A source of sound and detector are arranged as shown in Fig. The detec...

    Text Solution

    |

  10. A source of sound and detector are arranged as shown in Fig. The detec...

    Text Solution

    |

  11. A source of sound and detector are arranged as shown in Fig. The detec...

    Text Solution

    |

  12. As shown if Fig. a vibrating tuning fork of frequency 512 Hz is moving...

    Text Solution

    |

  13. As shown if Fig. a vibrating tuning fork of frequency 512 Hz is moving...

    Text Solution

    |

  14. As shown if Fig. a vibrating tuning fork of frequency 512 Hz is moving...

    Text Solution

    |

  15. As shown if Fig. a vibrating tuning fork of frequency 512 Hz is moving...

    Text Solution

    |

  16. A source of sound with natural frequency f0=1800Hz moves uniformly alo...

    Text Solution

    |

  17. A source of sound with natural frequency f0=1800Hz moves uniformly alo...

    Text Solution

    |

  18. A source of sound and a detector are placed at the same place on groun...

    Text Solution

    |

  19. A source of sound and a detector are placed at the same place on groun...

    Text Solution

    |

  20. A source of sound and a detector are placed at the same place on groun...

    Text Solution

    |