Home
Class 12
PHYSICS
Forty - one forks are so arranged that e...

Forty - one forks are so arranged that each products ` 5 beat//s` when sounded with its near fork . If the frequency of last fork is double the frequency of first and last fork , respectively are

A

200400

B

205410

C

195390

D

100200

Text Solution

Verified by Experts

The correct Answer is:
A
`n_(Las t)=n_(First)+(N-1)x`
`2n=n+(41-1) times 5`
`implies n_(First)=200 Hz and n_(Last)=400 Hz`
Promotional Banner

Topper's Solved these Questions

  • WAVES

    DISHA PUBLICATION|Exercise EXERCISE -2 CONCEPT APPLICATOR|30 Videos

  • WAVES

    DISHA PUBLICATION|Exercise EXERCISE -2 CONCEPT APPLICATOR|30 Videos

  • WAVE OPTICS

    DISHA PUBLICATION|Exercise EXERCISE-2 : CONCEPT APPLICATOR|30 Videos

Similar Questions

Explore conceptually related problems

A set of 24 tuning forks are so arranged that each gives 6 beats per second with the previous one. If the frequency of the last tuning fork is double that of the first, frequency of the second tuning fork is

A set 65 tuning forks is arranged so that each gives 3 beats per second with the previous one and the frequency of last fork is an octave of first. Then the frequencies of first and last tuning forks are

41 tuning forks are arranged such that every fork gives 5 beats with the next. The last fork has a frequency that is double of the first. The frequency of the first fork is :-

56 tuning forks are so arranged in series that each fork gives 4 beats per second with the previous one.The frequency of the last fork is three times that of the first.The frequency of the fork is

When one of the prong of a tuning fork is waxed a little then frequency of the fork will

50 tunning forks are arranged in increasing order of their frequencies such that each gives 4 beats/sec with its previous tuning fork. If the frequency of the last fork is octave of the first, then the frequency of the first tuning fork is

16 tuning forks are arranged in increasing order of frequency. Any two consecutive tuning forks when sounded together produce 8 beats per second. If the frequency of last tuning fork is twice that of first, the frequency of first tuning fork is :-

31 tuning forks are arranged in series in increasing order of frequencies and the frequency of the last tuning fork is 3 times the frequency of the first. If each tuning fork produces 4 beats/second with the preceding one, the frequency of the last tuning fork is

DISHA PUBLICATION-WAVES-EXERCISE 1 CONCEPT BUILDER
  1. Vibrations are produced in a vertical tube of length 150cm closed at o...

    Text Solution

    |

  2. A sonometer wire supports a 4 kg load and vibrates in fundamental mode...

    Text Solution

    |

  3. Three sound sources p,q and r have frequencies 400 Hz, 401 Hz and 402 ...

    Text Solution

    |

  4. Three waves of equal frequency having amplitudes 10mum, 4mum, 7mum arr...

    Text Solution

    |

  5. Two travelling waves y1=Asin[k(x-ct)] and y2=Asin[k(x+ct)] are superim...

    Text Solution

    |

  6. Two waves having the intensities in the ratio of 9 : 1 produce interfe...

    Text Solution

    |

  7. Ten tuning forks are arranged in increasing order of frequency is such...

    Text Solution

    |

  8. Forty - one forks are so arranged that each products 5 beat//s when s...

    Text Solution

    |

  9. In the figure shown the wave speed is v. The velocity of car is v0 The...

    Text Solution

    |

  10. What will be the frequency of beats formed from the superposition of t...

    Text Solution

    |

  11. Two sound sources S2 and S1 emit pure sinusoidal coherent waves in pha...

    Text Solution

    |

  12. The fundamental frequency of a somometer wire of length l is f0. A bri...

    Text Solution

    |

  13. A source of sound is moving with a uniform speed along a circle. The f...

    Text Solution

    |

  14. A whistle of frequency 385Hz rotates in a horizontal circle of radius ...

    Text Solution

    |

  15. A band playing music at a frequency f is moving towards a wall at a sp...

    Text Solution

    |

  16. a sound source emits frequency of 180 h(Z) when moving towards a rigid...

    Text Solution

    |

  17. A police car moving at 22 m//s. Chases a motorcyclist. The policeman s...

    Text Solution

    |

  18. A train approaching a hill at a speed of 60 km//hour sounds a whistle ...

    Text Solution

    |

  19. Two trains are moving towards each other at speeds of 20 m/s and 15 m/...

    Text Solution

    |

  20. Two trains move towards each other with same speed. Speed of sound is ...

    Text Solution

    |