Home
Class 11
PHYSICS
An underwater sonar source operating at ...

An underwater sonar source operating at a frequency of 60 kHz directs its beam towards the surface. If velocity of sound in air is 330 m/s, wavelength and frequency of the waves in air are :-

A

5.5 mm,60 kHz

B

3.30 m,60 kHz

C

5.5 mm, 30 kHz

D

5.5 mm,80 kHz

Text Solution

Verified by Experts

The correct Answer is:
A
`f_("air")=f_("water")rArr f_("air")=(v_("air"))/(v_("air"))=(330)/(60xx10^(3))=5.5`mm
Promotional Banner

Topper's Solved these Questions

  • WAVES AND OSCILLATIONS

    ALLEN|Exercise Part-1(Exercise-02)|19 Videos

  • WAVES AND OSCILLATIONS

    ALLEN|Exercise Part-1(Exercise-03)|31 Videos

  • WAVES AND OSCILLATIONS

    ALLEN|Exercise Part-3(Example)|32 Videos

  • SEMICONDUCTORS

    ALLEN|Exercise Part-3(Exercise-4)|51 Videos

Similar Questions

Explore conceptually related problems

What is the fundamental frequency of an open organ pipe of length 42.5 cm, if the velocity of sound in air is 340 m/s?

A source of sound of frequency 500 Hz is moving towards an observer with velocity 30 m/s . The speed of sound is 330 m/s . the frequency heard by the observer will be

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 man standing on a platform observes that the frequency of the sound of a whistle emitted by a train drops by 140 Hz. If the velocity of sound in air is 330 m/s and the speed of the train is 70 m/s, the frequency of the whistle is

Distance travelled by the sound produced by a tuning fork of frequency 50 Hz completing 200 vibrations is, (the velocity of sound in air is 330 m/s)

The frequency of sound is 100 Hz and wavelength is 3m. Calculate the velocity of the wave.

Calculate the frequency of fifth harmonic of a closed organ pipe of length 50cm, if the velocity of sound in air is 330 m/s.

Calculate the frequency of fifth harmonic of a closed organ pipe of length 50cm, if the velocity of sound in air is 330 m/s.

The difference between the apparent frequency of a source of sound as perceived by the observer during its approach and recession is 2% of the natural frequency of the source. If the velocity of sound in air is 300 m/s, the velocity of the source is

A listener is at rest and a police siren is moving away from the listerner at 60m/s. what frequency does the listerner hear given that the velocity of sound in air is 340m/s and frequency os siren is 500Hz?

ALLEN-WAVES AND OSCILLATIONS-Part-1(Exercise-01)
  1. A thunder tap is heard 5.5 s after the lightening flash. The distance ...

    Text Solution

    |

  2. At the room temperature the velocity of sound in O(2) gas is v. Then i...

    Text Solution

    |

  3. An underwater sonar source operating at a frequency of 60 kHz directs ...

    Text Solution

    |

  4. A tube closed at one end and containing air produced, when excited the...

    Text Solution

    |

  5. A cylindrical tube, open at both ends, has a fundamental frequency f i...

    Text Solution

    |

  6. An organ pipe P(1) closed at one end vibrating in its first harmonic a...

    Text Solution

    |

  7. An open pie is suddenly closed at one end with the result that the fre...

    Text Solution

    |

  8. The maximum length of a closed pipe that would produce a just audible ...

    Text Solution

    |

  9. A cylindrical tube (L = 129 cm) is in resonance with in tuning fork of...

    Text Solution

    |

  10. A closed organ pipe of radius r(1) and an open organ pipe of radius r(...

    Text Solution

    |

  11. Plane sound waves of wavelength 0.12 m are incident on two narrow slit...

    Text Solution

    |

  12. Two vibrating tunign forks produce progessive waves given by y(1)=4 ...

    Text Solution

    |

  13. Frequency of tuning fork A is 256 Hz. It produces 4 beats/second with ...

    Text Solution

    |

  14. Length of a sonometer wire is either 95 cm or 100 cm. In both the case...

    Text Solution

    |

  15. Two open pipes of length 25 cm and 25.5 cm produced 0.1 beat/second. T...

    Text Solution

    |

  16. 16 tuning forks are arranged in increasing order of frequency. Any two...

    Text Solution

    |

  17. Two tuning forks having frequency 256 Hz (A) and 262 Hz (B) tuning for...

    Text Solution

    |

  18. Two open pipes of length L are vibrated simultaneously. If length of o...

    Text Solution

    |

  19. (a) The power of sound from the speaker of a radio is 20 mW. By turnin...

    Text Solution

    |

  20. A sound absorber attenuates the sound level by 20 dB. The intensity de...

    Text Solution

    |