Home
Class 11
PHYSICS
Temperature of substances A and B are 72...

Temperature of substances A and B are `727^(@)C` and `327^(@)C` respectively, then ratio of rate of their radiant energy `H_(A):H_(B)=` . . . . .

A

`727:327`

B

`5:3`

C

`25:9`

D

`625:81`

Text Solution

Verified by Experts

The correct Answer is:
D
`T_(A)=273+727=1000K`
`T_(B)=273+327=600K`
Rate of radiant energy
`HpropT^(4)`
`:.(H_(A))/(H_(B))=(T_(A)^(4))/(T_(B)^(4))`
`=((1000)^(4))/((600)^(4))`
`=((10)/(6))^(4)`
`=((5)/(3))^(2)`
`=(625)/(81)`
`:.H_(A):H_(B)=625:81`
Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Question Paper (Section - A) Answer following in one sentence : (Word limit of answer is 10) (Each question carries 1 mark)|6 Videos

  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Question Paper (Section - B) Answer the following question in short : (Word limit of answer is 10) (Each carry 2 mark)|2 Videos

  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Section - E Multiple Choice Questions (MCQs)|30 Videos

  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

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

  • THERMODYANMICS

    KUMAR PRAKASHAN|Exercise Question Paper|11 Videos

Similar Questions

Explore conceptually related problems

Two black bodies at temperature 327^(@)C and 427^(@)C are arranged in a box of 27^(@)C variable temperature of free space, the ratio of their rate of radiant energy is . . . . ..

Temperature of two identical balls are 200^(@)C and 400^(@)C . Both are kept in surroundings of 27^(@)C . The ratio of their rate of radiation energy is . .. . . . .

The temperature of equal masses of three different liquids A,B and C are 12^@C, 19^@C and 28^@C respectively. The temperature when A and B are mixed is 16^@C and when B and C are mixed it is 23^@C . What should be the temperature when A and C are mixed?

Twelve conducting rods from the sides of a uniform cube of side l. If in steady state, B and H ends of the cube are at 100^(@)C and 0^(@)C respectively. Find the temperature of the junction 'A' :-

Two liquids A and B are at 30^@C and 20^@C , respectively When they are mixied in equal masses, the temperature of the mixture is found to be 26^@C . The ratio of their specific heat is

Three liquids A, B and C having same specific heat and mass m , 2 m and 3 m have temperature 20^(@)C , 40^(@)C and 60^(@)C respectively. Temperature of the mixture when: {:(,"Column-I",,"Column-II"),((A),"A and B are mixed",(p),33^(@)C),((B),"A and C are mixed",(q),52^(@)C),((C),"B and C are mixed",(r),50^(@)C),((D),"A,B and C all three are mixed",(s),46^(@)C),(,,(t),"None"):}

If the ratio of lengths, radii and Young's moduli of steel and brass wires in the figure are a, b and c respectively then the corresponding ratio of increase in their lengths is

KUMAR PRAKASHAN-THERMAL PROPERTIES OF MATTER-Section - F Question from Module (Sample questions for preparation of competitive exams)
  1. In . . . .. process, gravitation is necessary for transfer of heat e...

    Text Solution

    |

  2. Which of the following is not correct of radiation ?

    Text Solution

    |

  3. Temperature of two identical balls are 200^(@)C and 400^(@)C. Both are...

    Text Solution

    |

  4. Three large discs have same area. They are kept at equidistant in para...

    Text Solution

    |

  5. Thermal conductivity of coppe is 9 times that of steel. As shown in fi...

    Text Solution

    |

  6. Two black bodies at temperature 327^(@)C and 427^(@)C are arranged in ...

    Text Solution

    |

  7. 1.56xx10^(5) heat energy is transferred through wall 2 m^(2) and 12 cm...

    Text Solution

    |

  8. What will be the increment in heat energy radiated when the temperatur...

    Text Solution

    |

  9. Decrease in temperature is noticed by sprinkling water in closed room....

    Text Solution

    |

  10. Maximum wavelength of radiations from Sun and Moon are 25Å and 0.5xx10...

    Text Solution

    |

  11. Two substances A and B have relation T(A)=4T(B) for their absolute zer...

    Text Solution

    |

  12. . . . . . . gives relation between temperature and colour of star.

    Text Solution

    |

  13. In which process the rate of transfer of heat from one place to anothe...

    Text Solution

    |

  14. Temperature of body A of 0.5 to mass is 60^(@)C Temperature of body B ...

    Text Solution

    |

  15. Temperature of substances A and B are 727^(@)C and 327^(@)C respective...

    Text Solution

    |

  16. A cubical wooden box is hanged in a room by keeping the 15 kg ice in i...

    Text Solution

    |

  17. Consider a compound slab consisting of two different materials having ...

    Text Solution

    |

  18. A hot liquid in beaker at 80^(@)C cools down to 70^(@)C in 2 minutes i...

    Text Solution

    |