Home
Class 11
PHYSICS
If the temperature difference on the two...

If the temperature difference on the two sides of a wall increases from `100^@C` to `200^@C`, its thermal conductivity

A

remains unchanged

B

is doubled

C

is halved

D

becomes four times

Text Solution

Verified by Experts

The correct Answer is:
A

Thermal conductivity depends so the material, not on temperature difference
Promotional Banner

Topper's Solved these Questions

  • HEAT TRANSFER

    RESONANCE|Exercise Exercise-3|1 Videos
  • HEAT TRANSFER

    RESONANCE|Exercise Advancel Level Problems|17 Videos
  • HEAT TRANSFER

    RESONANCE|Exercise Exercise-2|1 Videos
  • GRAVITATION

    RESONANCE|Exercise Exercise|21 Videos
  • KINEMATICS

    RESONANCE|Exercise Exercise|65 Videos

Similar Questions

Explore conceptually related problems

1.56 × 10^5 J of heat is conducted through is 2 m^2 wall of 12 cm thick in one hour. Temperature difference between the two sides of the wall is 20 ^@C. The thermal conductivity of the material of the wall is (in Wm ^(-1) K^(-1) )

When the temperature of silicon sample is increased from 27^(@)C to 100^(@)C , the conductivity of silicon will be

A composite wall of area A is made of equal thickness of lead and iron having thermal conductivities K and 2K, respectively. The temperature on the two sides of the composite wall are 100^(@)C and 0^(@)C with the layer on the hotter side. Calculate the steady -state temperature of the lead-iron interface.

The rate of reaction is doubled for every 10^(@)C rise in temperature. The increase in rate as result of an increase in temperature from 10^(@)C to 100^(@)C is how many times of the original rate?

A steel bar 10.0 cm long is welded end to end to a copper bae 20.0 cm long. Both bars are insulated perfectly on their sides . Each bar has a separate cross-section, 2.00 cm on a side . The free end of the steel bar is maintained at 100^(@)C by placing it in contact with ice . find the temperature at the junction of the two bars and the total rate of heat flow . thermal conductivity of steel = 50.2 Wm^(-1)K^(-1) .thermal conductivity of copper =385 Wm^(-1)K^(-1) .

The graph shown gives the temperature along an X axis that extends directly through a wall consisting of three layers A , B and C . The air temperature on one side of the wall is 150^(@)C and on the other side is 80^(@)C . Thermal conduction through the wall is steady. out of the three layers A B and C thermal conductivity is greatest of the layer

In a zero order reaction for every 10^@ rise of temperature , the rate is doubled. If the temperature is increased from 10^@C " to " 100^@C , the rate of the reaction will become

RESONANCE-HEAT TRANSFER-Exercise
  1. Two plates each of area A, thickness L1 and L2 thermal conductivities ...

    Text Solution

    |

  2. Consider a compound slab consisting of two different material having e...

    Text Solution

    |

  3. A square is made of four rods of same material one of the diagonal of ...

    Text Solution

    |

  4. If the temperature difference on the two sides of a wall increases fro...

    Text Solution

    |

  5. The colour of a star indicates its

    Text Solution

    |

  6. The means of energy transfer in vacuum is:

    Text Solution

    |

  7. Which of the following is nearest to blackbody-

    Text Solution

    |

  8. Which of the following is true statement?

    Text Solution

    |

  9. For a black body at temperature 727^@C, its radiating power is 60 watt...

    Text Solution

    |

  10. According to Wien's law

    Text Solution

    |

  11. If lambda(m) denotes the wavelength at which the radiative emission fr...

    Text Solution

    |

  12. A black body at 1227^(@)C emits radiations with maximum intensity at a...

    Text Solution

    |

  13. The energy radiated by a black body is directly proportional to :

    Text Solution

    |

  14. If temperature becomes double, the emitted radiation will be :

    Text Solution

    |

  15. Prevost's theory of heat exchange tells that a body radiates thermal e...

    Text Solution

    |

  16. Reflection and absorption coefficient of a given surface at 0^@C for a...

    Text Solution

    |

  17. A black metal foil is warmed by radiation from a small sphere at tempe...

    Text Solution

    |

  18. A body takes 10 min to cool douwn from 62^@C to 50^@C. If the temperat...

    Text Solution

    |

  19. Two circular disc A and B with equal radii are blackened. They are hea...

    Text Solution

    |

  20. According to Newton's law of cooling, the rate of cooling of a body is...

    Text Solution

    |