Home
Class 11
PHYSICS
Three sound waves of equal amplitude hav...

Three sound waves of equal amplitude have frequencies (n-1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be ?

A

3

B

2

C

1

D

4

Text Solution

Verified by Experts

The correct Answer is:
B
Maximum no. of beats per unit time,
`= f _(max) -f _(min)`
`= (n +1) --(n-1)=2`
Promotional Banner

Topper's Solved these Questions

  • WAVES

    KUMAR PRAKASHAN|Exercise SECTION-F (Questions From Module) (Sample questions for preparation of competitive exams)|23 Videos

  • WAVES

    KUMAR PRAKASHAN|Exercise SECTION-D (NCERT Exemplar Solution) (Long Answer Type Questions)|5 Videos

  • UNITS AND MEASUREMENT

    KUMAR PRAKASHAN|Exercise Section -F (Questions from Module )|20 Videos

  • WORK, ENERGY AND POWER

    KUMAR PRAKASHAN|Exercise QUESTION PAPER (SECTION - D)|1 Videos

Similar Questions

Explore conceptually related problems

Two open pipes of length L are vibrated simultaneously. If length of one of the pipes is reduced by y. then the number of beats heats per second will be if the velocity of sound is v and y lt lt L :-

The resultant amplitude, when two waves of two waves of same frequency but with amplitudes a_(1) and a_(2) superimpose at phase difference of pi//2 will be :-

A vibrating string of certain length l under a tension T resonates with a mode corresponding to the first overtone (third harmonic ) of an air column of length 75 cm inside a tube closed at one end. The string also generates 4 beats//s with a tuning fork of frequency n . Now when the tension of the string is slightly increased the number of beats reduces to 2 per second. Assuming the velocity of sound in air to 340 m//s , the frequency n the tuning fork in H_(Z) is (a) 344 (b) 336 (c ) 117.3 (d) 109.3

When two waves of almost equal frequencies n_(1) and n_(2) reach at a point simultaneously, what is the time interval between successive maxima ?

A column of air at 51^(@) C and a tuning fork produce 4 beats per second when sounded together. As the temperature of the air column is decreased, the number of beats per second tends to decrease and when the temperature is 16^(@) C the two produce 1 beat per second. Find the frequency of the tuning fork.

A tuning fork A, marked 512 Hz, produces 5 beats per second, where sounded with another unmarked tuning fork B. If B is loaded with wax the number of beats is again 5 per second. What is the frequency of the tuning fork B when not loaded ?

The frequency of fork A is 3% more than the frequency of a standard fork where as the frequency of fork B is 3% less. The fork A and B produce 6 beats per second. The frequency of standard fork will be -

Two vibrating tuning forks produce progressive waves given by y, y _(1) = 4 sin 500 pi t and y _(2) = 2 sin 506 pi t. Number of beats produced per minute is ......

Two sound waves with wavelengths 5.0 m and 5.5 m respectively, each propagate in a gas with velocity 330 m/s. We expect the following number of beats per second

A string is cut into three parts, having fundamental frequencies n_(1),n_(2) and n_(3) respectively. Then original fundamental frequency 'n' related by the expression as (other quantities are identical) :-

KUMAR PRAKASHAN-WAVES-SECTION-E (Multiple Choice Questions (MCQs)) (MCQs asked in Gujarat Board and Competitive Exams)
  1. A uniform rope of length L and mass m, hangs vertically from a rigid s...

    Text Solution

    |

  2. The second overtone of an open organ pipe has the same frequency as th...

    Text Solution

    |

  3. Three sound waves of equal amplitude have frequencies (n-1), n, (n + 1...

    Text Solution

    |

  4. When I m long metallic rod is vertically dropped it strikes the solid ...

    Text Solution

    |

  5. When two organ pipes with fundamental frequencies n(1) and n(2) are c...

    Text Solution

    |

  6. A tuning fork is used to produce resonance in a glass tube. The length...

    Text Solution

    |

  7. Fundamental frequency of one open pipe is equal to third harmonic of c...

    Text Solution

    |

  8. An organ pipe closed at one end has fundamental frequency of 1500 Hz. ...

    Text Solution

    |

  9. A stone thrown into still water, creates a circular wave pattern movin...

    Text Solution

    |

  10. A boat at anchor is rocked by waves whose crests are 100 m apart and v...

    Text Solution

    |

  11. When a guitar string is sounded with a 440 Hz tuning fork, a beat freq...

    Text Solution

    |

  12. A siren emitting sound of frequency 800 Hz is going away from a static...

    Text Solution

    |

  13. Two closed organ pipes of length 100 cm and 101 cm produce 16 beats in...

    Text Solution

    |

  14. The second overtone of an open pipe has the same frequency as the firs...

    Text Solution

    |

  15. What is your observation when two sources are emitting sound with freq...

    Text Solution

    |

  16. If man were standing unsymmetrically between parallel cliffs, claps hi...

    Text Solution

    |

  17. A uniform string is vibrating with a fundamental frequency 'f. The new...

    Text Solution

    |

  18. Five sinusoidal waves have the same frequency 500 Hz but their amplitu...

    Text Solution

    |

  19. Mention the range of audible range for the humans.

    Text Solution

    |

  20. Among following media, sound has its maximum velocity in ......

    Text Solution

    |