Home
Class 12
PHYSICS
A wall has two layers A and B each made ...

A wall has two layers A and B each made of different materials. Both the layers have the same thickness. The thermal conductivity of materials A is twice of B. Under thermal equilibrium temperature difference across the layer B is `36^@C`. The temperature difference across layer A is

A

`6^(@)"C"`

B

`12^(@)"C"`

C

`18^(@)"C"`

D

`24^(@)"C"`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A wall has two layers A and B, each made of different material. Both the layers have the same thickness. The thermal conductivity of the meterial of A is twice that of B . Under thermal equilibrium, the temperature difference across the wall is 36^@C. The temperature difference across the layer A is

A wall has two layers A and B, each made of different materials. Both layers are of same thickness. But, the thermal conductivity of material A is twice that of B. If, in the steady state, the temperature difference across the wall is 24^(@)C , then the temperature difference across the layer B is :

A wall has two layers A and B each made of different materials. The layer A is 10cm thick and B is 20 cm thick. The thermal conductivity of A is thrice that of B. Under thermal equilibrium temperature difference across the wall is 35^@C . The difference of temperature across the layer A is

A partition wall has two layers A and B, in contact, each made of a different material. They have the same thickness but the thermal conductivity of layer A is twice that of layer B. If the steady state temperature difference across the wall is 60 K, then the corresponding difference across the layer A is

A partition wall has two layers of different materials A and B in contact with each other. They have the same thickness but the thermal conductivity of layer A is twice that of layer B. At steady state the temperature difference across the layer B is 50 K, then the corresponding difference across the layer A is

A wall has two layers A and B each made of different materials. The thickness of both the layers is the same. The thermal conductivity of A, K_(A) = 3K_(B) . The temperature different across the wall is 20^(@)C in thermal equilibrium

A composite slab consists of two parts of equal thickness. The thermal conductivity of one is twice that of the other. What will be the ratio of temperature difference across the two layers in the state of equilibrium ?

The wall with a cavity consists of two layers of brick separated by a layer of air All three lay-ers have the same thickness and the thermal conductivity of the brick is much greater than that of air The left layer is at a higher temperature than the tight layer and steady state condition exists Which of the following graphs perdicts correctly the variation of temperature T with distance d inside the cavity ?.

DISHA-HEAT TRANSFER AND NEWTONS LAW OF COOLING-physics
  1. Two rods (one semi-circular and other straight) of same material and o...

    Text Solution

    |

  2. A wall has two layers A and B each made of different materials. Both t...

    Text Solution

    |

  3. A room at 20^@C is heated by a heater of resistence 20 ohm connected t...

    Text Solution

    |

  4. A composite metal bar of uniform section is made up of length 25 cm of...

    Text Solution

    |

  5. Three rods of the same dimension have thermal conductivities 3K, 2K an...

    Text Solution

    |

  6. A black body is at a temperature of 2880 K. The energy of radiation em...

    Text Solution

    |

  7. A body initially at 80^(@)C cools to 64^(@)C in 5 minutes and to 52^(@...

    Text Solution

    |

  8. A 5 cm thick ice block is there on the surface of water in a lake. The...

    Text Solution

    |

  9. A cylindrical rod with one end in a steam chamber and the other end in...

    Text Solution

    |

  10. An ice box used for keeping eatables cool has a total wall area of 1m^...

    Text Solution

    |

  11. A solid copper sphere (density rho and specific heat c) of radius r at...

    Text Solution

    |

  12. Four rods of identical cross-sectional area and made from the same met...

    Text Solution

    |

  13. Consider two hot bodies B(1) and B(2) which have temperature 100^(@)"C...

    Text Solution

    |

  14. A body cools from 60^@C to 50^@C in 10 min. Find its temperature at ...

    Text Solution

    |

  15. The rates of cooling of two different liquids put in exactly similar c...

    Text Solution

    |

  16. For cooking the food, which of the following type of utensil is most s...

    Text Solution

    |

  17. Two rods A and B are of equal lengths. Their ends of kept between the ...

    Text Solution

    |

  18. While measuring the thermal conductivity of liquids the upper part is ...

    Text Solution

    |

  19. When fluids are heated from the bottom, convection currents are produc...

    Text Solution

    |

  20. If between wavelength lambda andlambda + dlambda, e(lambda) and a(lamb...

    Text Solution

    |