Home
Class 11
PHYSICS
Four sources of sound each of sound leve...

Four sources of sound each of sound level `10 dB` are sounded together in phase , the resultant intensity level will be `(log _(10) 2 = 0.3)`

A

`40 dB`

B

`26 dB`

C

`22 dB`

D

`13 dB`

Text Solution

Verified by Experts

The correct Answer is:
C
Resulant ampulitude will become `4` times.
Therefore , resultant intensity is `16` times
`L_(2) - L_(1) = log_(10) (I_(2))/(I_(1))`
or `I_(2) - 10 = 10 log _(10) (16)`
or `L_(2) = 22 dB`
Promotional Banner

Topper's Solved these Questions

  • SOUND WAVES

    DC PANDEY|Exercise Level 1 Subjective|45 Videos

  • SOUND WAVES

    DC PANDEY|Exercise Subjective Questions|1 Videos

  • SOUND WAVES

    DC PANDEY|Exercise Level 1 Assertion And Reason|10 Videos

  • SOLVD PAPERS 2017 NEET, AIIMS & JIPMER

    DC PANDEY|Exercise Solved paper 2018(JIPMER)|38 Videos

  • SUPERPOSITION OF WAVES

    DC PANDEY|Exercise Level 2 Subjective|8 Videos

Similar Questions

Explore conceptually related problems

Four souces of sound each of sound level 10dB are sounded together in phase, the resultant intensity level will be (110/n) dB. Find value of n (log_(10)2=0.3) .

Two sounds differ in sound level by 3.00 dB. What is the ratio of the greater intensity to the smaller intensity?

The intensity of sound B is 500 times that of sound A. What is the difference in their intensity levels?

A sound has an intensity of 2 xx 10^(-8) W//m^(2) . Its intensity level in decibels is (log_(10) 2 = 0.3)

At a distance r = 100 m from a isotropic point sources of sound 200 Hz the loudness level is L = 50 dB . The standard intensity level, i.e., intensity level just audible to human ear is I_(0) = 0.1 n W//m^(2) . Find the sonic power of the source.

The intensity level of two sounds are 100 dB and 50 dB. What is the ratio of their intensities?

S_(1) and S_(2) are two coherent sources of sound of frequency 110Hz each they have no initial phase difference. The intensity at a point P due to S_(1) is I_0 and due to S_2 is 4I_0 . If the velocity of sound is 330m//s then the resultant intensity at P is

Calculate the sound level (in decibels) of a sound wave that has an intensity of 4.00mu(W)/(m^2) .

When a person wears a hearing aid, the sound intensity level increases by 30 dB. The sound intensity increases by

DC PANDEY-SOUND WAVES-Level 1 Objective
  1. A vehicle , with a horn of frequency n is moving with a velocity of 30...

    Text Solution

    |

  2. How many frequencies below 1 kH(Z) of natural oscillations of air colu...

    Text Solution

    |

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

    Text Solution

    |

  4. Two sound waves of wavelengths lambda(1) and lambda(2) (lambda (2) gt ...

    Text Solution

    |

  5. A, Band C are three tuning forks. Frequency of A is 350 H(Z) . Beats p...

    Text Solution

    |

  6. The first resonance length of a resonance tube is 40 cm and the second...

    Text Solution

    |

  7. Two identical wires are streched by the same tension of 100 N and each...

    Text Solution

    |

  8. A tuning fork of frequency 340 Hz is excited and held above a cylindri...

    Text Solution

    |

  9. In a closed end pipe of length 105 cm , standing waves are set up corr...

    Text Solution

    |

  10. Oxygen is 16 times heavier than hydrogen. At NTP equal volumn of hydro...

    Text Solution

    |

  11. A train is moving towards a stationary observer. Which of the followin...

    Text Solution

    |

  12. A closed organ pipe and an open organ pipe of same length produce 4 be...

    Text Solution

    |

  13. One train is approaching an observer at rest and another train is rece...

    Text Solution

    |

  14. Speed of sound in air is 320 m//s . A pipe closed at one end has a len...

    Text Solution

    |

  15. Four sources of sound each of sound level 10 dB are sounded together i...

    Text Solution

    |

  16. A longitudinal sound wave given by p = 2.5 sin.(pi)/(2) (x - 600 t) (p...

    Text Solution

    |

  17. Sound waves of frequency 600 H(Z) fall normally on perfectly reflectin...

    Text Solution

    |

  18. The wavelength of two sound waves are 49 cm and 50 cm , respectively ....

    Text Solution

    |

  19. Two persons A and B , each carring a source of frequency 300 H(Z) , ar...

    Text Solution

    |

  20. A fixed source of sound emitting a certain frequency appears as f(a) w...

    Text Solution

    |