Home
Class 8
PHYSICS
Black surface is a...

Black surface is a

A

good absorber of heat energy.

B

good radiator o heat energy.

C

Both a and b

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C

Black surface is a good absorber as well as good radiator of heat energy.
Promotional Banner

Topper's Solved these Questions

  • HEAT

    PEARSON IIT JEE FOUNDATION|Exercise LEVEL 2|19 Videos
  • HEAT

    PEARSON IIT JEE FOUNDATION|Exercise LEVEL 3|10 Videos
  • HEAT

    PEARSON IIT JEE FOUNDATION|Exercise LEVEL 1 Match the column|1 Videos
  • FRICTION

    PEARSON IIT JEE FOUNDATION|Exercise Competition Corner |54 Videos
  • HYDROSTATICS

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (LEVEL 3)|10 Videos

Similar Questions

Explore conceptually related problems

Three very large plates of same area are kept parallel and close to each other. They are considered as ideal black surface and have very high thermal conductivity The first and thired plates are maintained at temperatures 2T and 3T respectively Find the temperature of the middle (i.e second) plate under steady state .

A metal sphere with a black surface and radius 30 min , is cooled to -73C (200K) and placed inside an enclosure at a temperature of 27^(@)C(300K) . Calculate the initial rate of temperature rise of the sphere, assuming the sphere is a black body. (Assume density of metal =8000 kg m^(-3) specific heat capacity of metal =400 J kg^(-1)K^(-1) , and Stefan constant =5.7xx10^(-8)Wm^(-2)K^(-4) ).

The solar constant is the amount of heat energy received per second per unit area of a perfectly black surface placed at a mean distance of the Earth form the Sun, in the absence of Earth's atmosphere, the surface being held perpendicular to the direction of Sun's rays. Its value is 1388 W//m^(2) . If the solar constant for the earth is 's'. The surface temperature of the sun is TK,D is the diameter of the sun, R is the mean distance of the Earth from the sun. The sun subtends a small angle 'theta' at the earth. Then correct options is/are:-

Assertion : The radiation from the sun’s surface varies as the fourth power of its absolute temperature. Reason : The sun is not a black body.

A black rectangular surface of area A emits energy E per second at 27^circC . If length and breadth are reduced to initial value and temperature is raised to 327^circC , then energy emitted per second becomes

PEARSON IIT JEE FOUNDATION-HEAT-LEVEL 1 MCQ s
  1. In the process of boiling,

    Text Solution

    |

  2. When the pressure increased,

    Text Solution

    |

  3. Food in the pressure cooker is cooked faster, as

    Text Solution

    |

  4. Given that the ratio of specific heat capacity of alcohol to that of w...

    Text Solution

    |

  5. -40^(@)C is numerically equal to

    Text Solution

    |

  6. Which of the following properties are suitable for making cooking uten...

    Text Solution

    |

  7. The advantage of alcohol is thermometric liquid is due to its

    Text Solution

    |

  8. The temperature at which molecular movement of matter ceases is called

    Text Solution

    |

  9. Gas thermometers are more sensitive as compared to liquid thermometers...

    Text Solution

    |

  10. Which among the following is the hottest substance?

    Text Solution

    |

  11. Mercury is used as thermometer liquid. Which among the following prope...

    Text Solution

    |

  12. A difference of temperature of 25^(@)C is equivalent to a difference o...

    Text Solution

    |

  13. Arrange the following steps in proper sequence for the construction an...

    Text Solution

    |

  14. A ginven substance of mass 'm' is in solid state at certain temperatur...

    Text Solution

    |

  15. Black surface is a

    Text Solution

    |

  16. As the temperature difference between the ends of a conductor increase...

    Text Solution

    |

  17. heat transfer rate is more ini

    Text Solution

    |

  18. Which of the following statements is (are) true about conduction?

    Text Solution

    |

  19. A piece of ice at 0^(@)C is dropped into water at 32^(@)F. Which of th...

    Text Solution

    |

  20. Which among the following statement is/are correct?

    Text Solution

    |