Home
Class 11
PHYSICS
The end of two rods of different materia...

The end of two rods of different materials with their thermal conductivities, area of cross-section and lengths all in the ratio 1:2 are maintained at the same temperature difference. If the rate of flow of heat in the first rod is `4 cal//s`. Then, in the second rod rate of heat flow in `cal//s ` will be

A

1

B

2

C

8

D

16

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • TRANSMISSION OF HEAT

    ERRORLESS |Exercise Convection|13 Videos

  • TRANSMISSION OF HEAT

    ERRORLESS |Exercise Radiation (General, Kirchoff s law, Black body)|38 Videos

  • THERMOMETRY, THERMAL EXPANSION AND CALORIMETRY

    ERRORLESS |Exercise Self Evaluation Test|15 Videos

  • UNITS, DIMENSION & MEASUREMENTS

    ERRORLESS |Exercise All Questions|333 Videos

Similar Questions

Explore conceptually related problems

The ends of the two rods of different materials with their lengths, diameters of cross-section and thermal conductivities all in the ratio 1 : 2 are maintained at the same temperature difference. The rate of flow of heat in the shorter rod is 1cals^(-1) . What is the rate of flow of heat in the larger rod:

Two rods one is semi circular of thermal conductivity K_(1) and otheir is straight of thermal conductivity K_(2) and of same cross sectional area are joined as shown in the The points A and B are maintained at same temperature difference. If rate of flow of heat is same in two rods then K_(1)//K_(2) is .

Two rods of the same length and areas of cross-section A_1 and A_2 have their ends at the same temperature. K_1 and K_2 are the thermal conductivities of the two rods. The rate of flow of heat is same in both the rods if-

The ratio of thermal conductivity of two rods of different material is 5 : 4 . The two rods of same area of cross-section and same thermal resistance will have the lengths in the ratio

Two identical rods of same metal are first waleded in series and then in parallel are maintained at same temperature difference then the ratio of heats conducted in same time is .

Which of the following rods made of same material will conduct more heat in given time when their ends are maintained at the same temperature difference .

The ratio of the diameters of two metallic rods of the same material is 2 : 1 and their lengths are in the ratio 1 : 4 . If the temperature difference between their ends are equal, the rate of flow of heat in them will be in the ratio

Two rods P and Q of equal lengths have thermal conductivities K_(1) and K_(2) and cross-sectional areas A_(1) and A_(2) respectively. If the temperature difference across the ends of each rod is the same, then the condition for which the rate of flow of heat through each of them will be equal, is

The ratio of the areas of cross section of two rods of different materials is 1:2 and the ratio of ther themal conductivities of their mateirals is 4: 3. On keeping equal temperature difference between the ends of theserods, the rate of conduction of heat are equal. The ratio of the lengths of the rods is

ERRORLESS -TRANSMISSION OF HEAT-ET Self Evaluation Test
  1. The end of two rods of different materials with their thermal conducti...

    Text Solution

    |

  2. A rod of 40 cm in length and temperature difference of 80^(@)C at its ...

    Text Solution

    |

  3. Two vessels of different materials are similar in size in every respec...

    Text Solution

    |

  4. In a steady state of thermal conduction, temperature of the ends A and...

    Text Solution

    |

  5. Four rods of silver, copper, brass and wood are of same shape. They ar...

    Text Solution

    |

  6. The two opposite faces of a cubical piece of iron (thermal conductivit...

    Text Solution

    |

  7. Wein's constant is 2892xx10^(-6) MKS unit and the value of lambda(m) f...

    Text Solution

    |

  8. If at temperature T(1) = 1000 K the wavelength is 1.4 xx 10^(-6)m then...

    Text Solution

    |

  9. The wavelength of maximum intensity of radiation emitted by a star is ...

    Text Solution

    |

  10. Two friends A and B are waiting for another friend for tea. A took the...

    Text Solution

    |

  11. There are two spherical balls A and B of the same material with same s...

    Text Solution

    |

  12. Five identical rods are joined as shown in figure. Point A and C are ...

    Text Solution

    |

  13. We cannot boil water inside the earth's satellite. Explain.

    Text Solution

    |

  14. In the following figure, two insulating sheets with thermal resistance...

    Text Solution

    |

  15. The top of an insulated cylindrical container is covered by a disc hav...

    Text Solution

    |

  16. Figure. Shows two air filled bulbs connected by a U-tube partly filled...

    Text Solution

    |

  17. Two conducting rods A and B of same length and cross-sectional area ar...

    Text Solution

    |

  18. The area of the glass of a window of a room is 10 m^(2) and thickness ...

    Text Solution

    |

  19. The spectrum from a black body radiation is a

    Text Solution

    |

  20. The Wien’s displacement law express relation between

    Text Solution

    |

  21. A black body is heated from 27^(@)C to 127^(@)C. The ratio of their en...

    Text Solution

    |