Home
Class 12
BIOLOGY
The loudness of a sound that a person ca...

The loudness of a sound that a person can withstand without discomfort is about  
(A) 150 dB
(B) 215 dB
(C) 30 dB
(D) 80 dB

A

150 dB

B

215 dB

C

30 dB

D

80 dB

Text Solution

Verified by Experts

The correct Answer is:
D
Green muffler is related to pollution of noise.
Noise pollution is measured in decibels (dB).
Intensity level of whispering sound is 20 - 40 dB.
Intensity of sound in normal conservation is 30 - 60 dB.
Day time sound level in silent zone is 50 dB.
Noise become uncomfortable above 80 dB.
Sound become hazardous noise pollution at level above 80 dB.
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL ISSUES

    KUMAR PRAKASHAN|Exercise Section - E (Solution of NCERT Exemplar)(Very Short Answer Type Questions (VSQs))|15 Videos

  • ENVIRONMENTAL ISSUES

    KUMAR PRAKASHAN|Exercise Section - E (Solution of NCERT Exemplar)(Short Answer Type Questions )|11 Videos

  • ENVIRONMENTAL ISSUES

    KUMAR PRAKASHAN|Exercise Section - D(Textual Exercise)|11 Videos

  • ECOSYSTEM

    KUMAR PRAKASHAN|Exercise SECTION - F (MCQs ASKED IN COMPETTIVE EXAM)|84 Videos

  • EVOLUTION

    KUMAR PRAKASHAN|Exercise SECTION - F (Multiple Choice Questions)|198 Videos

Similar Questions

Explore conceptually related problems

Water is drained from a vertical cylindrical tank by opening a valve at the base of the tank. It is known that the rate at which the water level drops is proportional to the square root of water depth y , where the constant of proportionality k >0 depends on the acceleration due to gravity and the geometry of the hole. If t is measured in minutes and k=1/(15), then the time to drain the tank if the water is 4 m deep to start with is (a) 30 min (b) 45 min (c) 60 min (d) 80 min

Pollen grains can be stored for several years in liquid nitrogen having a temperature of (A) -160^(@)C (B) -120^(@)C (C) -196^(@)C (D) -80^(@)C

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other? (A) Viola (B) Hydrilla (C) Banana (D) Yucca

A tuning fork of 512 H_(Z) is used to produce resonance in a resonance tube expertiment. The level of water at first resonance is 30.7 cm and at second resonance is 63.2 cm . The error in calculating velocity of sound is (a) 204.1 cm//s (b) 110 cm//s (c) 58 cm//s (d) 280 cm//s

If the length of sub-normal is equal to the length of sub-tangent at any point (3,4) on the curve y=f(x) and the tangent at (3,4) to y=f(x) meets the coordinate axes at Aa n dB , then the maximum area of the triangle O A B , where O is origin, is 45/2 (b) 49/2 (c) 25/2 (d) 81/2

(a) The power of sound from the speaker of a radio is 20 mW. By turning the knob of volume control the power of sound is increased to 400 mW, What is the power increase in dB as compared to original power? (b) How much more intense is an 80 dB sound than a 20 dB whisper?

Wave property of electron implies that they will show diffraction effected . Davisson and Germer demonstrated this by diffracting electron from crystals . The law governing the diffraction from a crystals is obtained by requiring that electron waves reflected from the planes of atoms in a crystal inter fere constructiely If a strong diffraction peak is observed when electrons are incident at an angle i from the normal to the crystal planes with distance d between them (see fig) de Brogle wavelength lambda_(dB) of electrons can be calculated by the relationship (n is an intenger)

A sound absorber attenuates the sound level by 20 dB . The intensity decreases by a factor of

Consider the parabola y^2=4xdot Let A-=(4,-4) and B-=(9,6) be two fixed points on the parabola. Let C be a moving point on the parabola between Aa n dB such that the area of the triangle A B C is maximum. Then the coordinates of C are (1/4,1) (b) (4,4) (3,2/(sqrt(3))) (d) (3,-2sqrt(3))

A monkey of mass 40 kg climbs on a rope which can withstand a maximum tesion of 600 N In which of the following cases will the rope break ? The monkey (a) climbs up with an acceleration of 6 ms^(-2) (b) climbs down with an acceleration of 4 ms^(-2) (c) climbs up with a unifrom speed of 5 ms^(-1) (d) falls down the rope nearly freely under gravity Ignore the mass of the rope .

KUMAR PRAKASHAN-ENVIRONMENTAL ISSUES-Section - E (Solution of NCERT Exemplar)(Multiple Choice Questions (MCQs))
  1. The material generally used for sound proofing of rooms like a recordi...

    Text Solution

    |

  2. Compressed Natural Gas (CNG) is  (A) propane (B) Methane (C) etha...

    Text Solution

    |

  3. World's most problematic aquatic weed is  (A) Azolla (B) Wolffia ...

    Text Solution

    |

  4. Which of the following exhibits biomagnification ?  (A) SO(2) (B) M...

    Text Solution

    |

  5. The expanded form of DDT is :  (A) dichloro diphenyl trichloroethane ...

    Text Solution

    |

  6. Which of the following material takes the longest time for biodegradat...

    Text Solution

    |

  7. Choose  the incorrect statement (A) The Montreal protocol is associat...

    Text Solution

    |

  8. Among the following which one causes maximum indoor chemical pollution...

    Text Solution

    |

  9. The green scum seen in the fresh water bodies is :  (A) blue-green al...

    Text Solution

    |

  10. The loudness of a sound that a person can withstand without discomfort...

    Text Solution

    |

  11. The major source of noise pollution worldwide is due to :   (A) offic...

    Text Solution

    |

  12. The correct matches is,   (A) A-iii, B-iv, C-i, D-ii (B) A-i, B...

    Text Solution

    |

  13. Catalytic converters are fitted into automobiles to reduce emission of...

    Text Solution

    |

  14. Why is it necessary to remove sulphur from petroleum products ?   (A)...

    Text Solution

    |

  15. Which one of the following impurities is easiest to remove from waste ...

    Text Solution

    |

  16. Which one of the following diseases is not caused due to contamination...

    Text Solution

    |

  17. Nuisance growth of aquatic plants and bloom forming algae in natural w...

    Text Solution

    |

  18. Algal blooms impart a distinct colour to water due to :   (A) their p...

    Text Solution

    |

  19. Match the items in column I and column II and choose the correct optio...

    Text Solution

    |

  20. In the textbook you came across "Three Mile Island and Chernobyl disas...

    Text Solution

    |