Home
Class 11
PHYSICS
The temperature across two different sla...


The temperature across two different slabs A and B are shown I the steady state (as shown Fig) The ratio of thermal conductivities of A and B is

A

`2:3`

B

`3:2`

C

`1:1`

D

`5:3`

Text Solution

Verified by Experts

The correct Answer is:
B
`((dQ)/(dt))xx(1)/(A)=K_(A)((50-30))/(3)=K_(B)((50-20))/(3)`
`2KA = 3KB or KA//KB =3//2` .
Promotional Banner

Topper's Solved these Questions

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL-I(H.W)|19 Videos

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL-II(C.W)|27 Videos

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise SINGLE ANSWER QUESTIONS Passage -1|1 Videos

  • THERMODYNAMICS

    NARAYNA|Exercise Exercise|187 Videos

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise STATEMENT TYPE QUESTION|23 Videos

Similar Questions

Explore conceptually related problems

Two different rods A and B are kept as shown in figure . The variation of temperature of different cross sections with distance is plotted in a graph shown in figure . The ration of thermal conductivities of A and B is -

There are two coils A and B as shown in Fig.

Steady state temperature are shown in the diagram. Find ratio of thermal conductivity k_1/k_2 if length of all rods are same

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

Two rods of similar area of cross section and length are joined as shown in the figure. The ratio of their thermal conductivity is 2:3. The free ends are maintained at 100^(@)C and 0^(@)C respectivley. THE temperature at junction in steady state is

The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x respectively. Temperatures on the opposite faces of composite slab are T_(1) and T_(2) where T_(2)gtT_(1) , as shown in fig. what is the rate of flow of heat through the slab in a steady state?

Three identical rods are joined at point O as shown in the figure. In the steady state, fid the ratio of thermal current through rod AO and OC. ltBrgt

A composite slab consists of two slabs A and B of different materials but of the same thickness placed one on top of the other. The thermal conductivities of A and B are k_(1) and K_(2) respectively. A steady temperature difference of 12^(@)C is maintained across the composite slab. If k_(1) = K_(2)//2 , the temperature difference across slab A will be:

NARAYNA-TRANSMISSION OF HEAT-SINGLE ANSWER QUESTIONS
  1. An irregular rod of same uniform material as shown in is conducting he...

    Text Solution

    |

  2. A solid copper sphere of dimater 10mm is cooled to temperature of 150K...

    Text Solution

    |

  3. The temperature across two different slabs A and B are shown I the ste...

    Text Solution

    |

  4. The temperature drop through a two layer furnace wall is 900^@C. Each ...

    Text Solution

    |

  5. Seven identical rods of matrical of thermal conductivity k are connect...

    Text Solution

    |

  6. A composite block is made of slabs A,B,C,D and E of different thermal ...

    Text Solution

    |

  7. In Newton's law of cooling (d theta)/(dt)=-k(theta-theta(0)) the const...

    Text Solution

    |

  8. Consider a spherical body A of radius R which is placed concentrically...

    Text Solution

    |

  9. Consider a spherical body A of radius R which is placed concentrically...

    Text Solution

    |

  10. Consider a spherical body A of radius R which is placed concentrically...

    Text Solution

    |

  11. A highly conducting solid sphere of radius R density rho and specific ...

    Text Solution

    |

  12. A highly conducting solid sphere of radius R density rho and specific ...

    Text Solution

    |

  13. A few rods of materials X and Y are connected as shown in The cross-se...

    Text Solution

    |

  14. A hot body placed in air is cooled down according to newton's law of c...

    Text Solution

    |

  15. One end of a uniform rod of length 1m is placed in boilling water whil...

    Text Solution

    |

  16. Two identical rods are connected between two containers. One of them i...

    Text Solution

    |

  17. A metal rod AB of length 10x has its one end A in ice at 0^@C, and the...

    Text Solution

    |

  18. A metal is heated in a furnace where a sensor is kept above the metal ...

    Text Solution

    |

  19. The distance of the Earth from the Sun is 4 times that of the planet M...

    Text Solution

    |

  20. A metal block is placed in a room which is at 10^(@)C for long time. N...

    Text Solution

    |