Home
Class 11
PHYSICS
A slab consists of two layers of differe...

A slab consists of two layers of different materials of the same thickness and having thermal conductivities `K_(1)` and `K_(2)`. The equivalent thermal conductivity of the slab is

A

`K_(1)+K_(2)`

B

`(K_(1)+K_(2))/(2)`

C

`(2K_(1)K_(2))/(K_(1)+K_(2))`

D

`(K_(1)+K_(2))/(2K_(1)K_(2))`

Text Solution

Verified by Experts

The correct Answer is:
B
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

A slab consists of two parallel layers of two different materials of same thickness having thermal conductivities K_(1) and K_(2) . The equivalent conductivity of the combination is

Consider a compound slab consisting of two different material having equal thickness and thermal conductivities K and 2K respectively. The equivalent thermal conductivity of the slab is

Two rods of the same length and diameter, having thermal conductivities K_(1) and K_(2) , are joined in parallel. The equivalent thermal conductivity to the combinationk is

Three rods of same dimension are joined in series having thermal conductivity k_1 , k_2 and k_3 . The equivalent thermal conductivity is

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_(1) and K_(2) . The thermal conductivity of the composite rod will be

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_(1) and K_(2) . The thermal conductivity of the composite rod will be

A slab consists of two parallel layers of copper and brass of the same thichness and having thermal conductivities in the ratio 1:4 If the free face of brass is at 100^(@)C anf that of copper at 0^(@)C the temperature of interface is .

ERRORLESS -TRANSMISSION OF HEAT-ET Self Evaluation Test
  1. A slab consists of two layers of different materials of the same thick...

    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

    |