Home
Class 11
PHYSICS
Two metal rods 1and 2 of same lengths ha...

Two metal rods 1and 2 of same lengths have same temperature difference between their ends . Their thermal conductivities and `K_1` and `K_2` and cross sectional areas `A_1`and `A_2` respectively .If the rate of heat conduction in 1 is four times that in 2, then

A

`K_1A_1=K_2A_2`

B

`K_1A_1=4K_2A_2`

C

`K_1A_1=2K_2A_2`

D

`4K_1A_1=K_2A_2`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • BEHAVIOUR OF PERFECT GAS AND KINETIC THEORY

    SARAS PUBLICATION|Exercise EXAMPLE|24 Videos

  • GRAVITATION

    SARAS PUBLICATION|Exercise EXAMPLE|34 Videos

Similar Questions

Explore conceptually related problems

Two rods of same length and cross section are joined along the length. Thermal conductivities of first and second rod are K_1 and K_2 . The temperature of the free ends of the first and second rods are maintained at θ_1 and θ_2 respectively. The temperature of the common junction is

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

A composite slab is prepared by pasting two plates of thickness L_(1) and L_(2) and thermal conductivities K_(1) and K_(2) . The slab have equal cross-sectional area. Find the equivalent conductivity of the composite slab.

If same force is acting on two masses m_1 and m_2 and the accelerations of two bodies are a_1 and a_2 respectively, then

If two metallic plates of equal thickness and thermal conductivities K_1 and K_2 ​are put together face to face and a common plate is constructed, then the equivalent thermal conductivity of this plate will be

The lengths and radii of two rods made of same material are in the ratios 1 : 2 and 2 : 3 respectively. If the temperature difference between the ends for the two rods be the same, then in the steady state, the amount of heat flowing per second through them will be in the ratio

The ends of two rods of different materials with their thermal conductivities, radii of cross sections and lengths all in the ratio 1 : 2 are maintained at the same temperature difference, if the rate of flow of heat in the larger rod is 4 cal/ sec, the rate of flow of heat in the shorter rod will be

Two cylinders P and Q have the same length and diameter and are made of different materials having thermal conductivities in the ratio 2:3. These two cylinders are combined to make a cylinder. One end of P is kept at 100°C and another end of Q at 0°C. The temperature at the interface of P and Q is

SARAS PUBLICATION-BULK MATTER -EXAMPLE
  1. If the ratio of diameters,lengths and Young’s modulus of steel and cop...

    Text Solution

    |

  2. The density of water at 20^@ is 998 kg//m^3 and at 40^@ 992kg//m^3 The...

    Text Solution

    |

  3. Two metal rods 1and 2 of same lengths have same temperature difference...

    Text Solution

    |

  4. In a vessel, the gas is at a pressure P.If the mass of all the molecul...

    Text Solution

    |

  5. The following four wires are made of the same material. Which of these...

    Text Solution

    |

  6. The wettability of a surface by a liquid depends primarily on

    Text Solution

    |

  7. A piece of iron is heated in a flame . It first becomes dull red then ...

    Text Solution

    |

  8. The amount of heat energy required to raise the temperature of 1g of h...

    Text Solution

    |

  9. A black hole is an object whose gravitational field is so strong that ...

    Text Solution

    |

  10. Steam at 100^@ C is passed.into 20 g of water at10^@C Whenwater acquir...

    Text Solution

    |

  11. Certain quantity of water,cools from 70^@C to 60^@C in the first 5 min...

    Text Solution

    |

  12. One mole of an ideal diatomice gas undergoes a transition from AtoB al...

    Text Solution

    |

  13. The ratio of the specific heats (Cp)/(Cv)=gamma in terms of degrees o...

    Text Solution

    |

  14. Figures below shows two paths that may be taken by a gas to go from a ...

    Text Solution

    |

  15. The two ends of metal rod are maintained at temperatures 100^@C and 11...

    Text Solution

    |

  16. The young's modulus of steel is twice that of brass . Two wires of sam...

    Text Solution

    |

  17. Light of wavelength 500 nm is incident on a metal with work function 2...

    Text Solution

    |

  18. If dimensions of critical velocity of a liquid vc flowing through a tu...

    Text Solution

    |

  19. A bullet of mass 10g moving horizontally with a velocity of 400 ms^-1s...

    Text Solution

    |

  20. A rectangular film of liquid is extended from (4cmxx2cm)to(5cmxx4cm).I...

    Text Solution

    |