Home
Class 12
PHYSICS
A ring consisting of two parts ADB and A...

A ring consisting of two parts `ADB` and `ACB` of same conductivity k carries an amount of heat `H` The `ADB` part is now replaced with another metal keeping the temperature `T_91)` and `T_(2)` constant The heat carried increases to `2H` What should be the conductivity of the new `ADB` Given `(ACB)/(ADB)=3`
.

A

`7/3k`

B

`2 k`

C

`5/2 k`

D

`3k`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • HEAT TRANSFER & THERMAL EXPANSION

    MOTION|Exercise Exercise - 3 Section-A|21 Videos

  • HEAT TRANSFER & THERMAL EXPANSION

    MOTION|Exercise Exercise - 3 Section-B|19 Videos

  • HEAT TRANSFER & THERMAL EXPANSION

    MOTION|Exercise EXERCISE - 1|60 Videos

  • HEAT - 1

    MOTION|Exercise EXERCISE -4 (Level - II) Previous Year | JEE Advanced|22 Videos

  • HEAT-2

    MOTION|Exercise EXERCISE-4 (LEVEL-II)|30 Videos

Similar Questions

Explore conceptually related problems

Consider two rods of same length and different specific heats ( S_1 and S_2 ), conductivities K_1 and K_2 and area of cross section ( A_1 and A_2 ) and both having temperature T_1 and T_2 at their ends. If the rate of heat loss due to conduction is equal then

A rod of length l and cross sectional area A has a variable conductivity given by K=alphaT , where alpha is a positive constant T is temperatures in Kelvin. Two ends of the rod are maintained at temperatures T_1 and T_2(T_1gtT_2) . Heat current flowing through the rod will be

A rod of length l and cross-section area A has a variable thermal conductivity given by K = alpha T, where alpha is a positive constant and T is temperature in kelvin. Two ends of the rod are maintained at temperature T_(1) and T_(2) (T_(1)gtT_(2)) . Heat current flowing through the rod will be

A rod of length l with thermally insulated lateral surface consists of material whose heat conductivity coefficient varies with temperature as k= a//T , where a is a constant. The ends of the rod are kept at temperatures T_1 and T_2 . Find the function T(x), where x is the distance from the end whose temperature is T_1 .

Two rods A and B have lengths l_1 and l_2. Each rod has its ends at temperature T_1 and T_2 Radii fo cross section of the two rods are same. The condition for equal flow of heat through those two rods is (K_1, K_2 are thermal conductivities of two rods)

A window with double-pane is used for insulating a room thermally from outside. It consists of two glass sheets, each of area A and thickness d with a separation x between them. At equilibrium, the room-glass interface and glass-outside interface are at constant temperature of T_r and T_a respectively. What will the rate of heat flow through the window pane? The thermal conductivity of glass and air are K_1 and K_2 , respectively.

Three rods of same cross-section but different length and conductivity are joined in series . If the temperature of the two extreme ends are T_(1) and T_(2) (T_(1)gtT_(2)) find the rate of heat transfer H.

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?

A composite slab consists of two rectangular slabs of different materials, having coefficients of conductivity 2K and K. The two ends of the slabs are at temperatures T_1 and T_2 (where T_1 gt T_2 ). How will the rate of heat flow depend on a where 3a and a are the lengths of two slabs? Consider that the two slabs have equal thickness.

MOTION-HEAT TRANSFER & THERMAL EXPANSION -EXERCISE - 2
  1. A lake surface is exposed to an atmosphere where the temperature is lt...

    Text Solution

    |

  2. Two sheets of thickness d and 2d and same area are touching each other...

    Text Solution

    |

  3. A ring consisting of two parts ADB and ACB of same conductivity k carr...

    Text Solution

    |

  4. Three conducting rods of same material and cross-section are shown in ...

    Text Solution

    |

  5. Wires A and B have have identical lengths and have circular cross-sect...

    Text Solution

    |

  6. A cylinder of radius R made of a material of thermal conductivity K1 i...

    Text Solution

    |

  7. Six identical cunducting rods are joined as shown in Fig. Points A and...

    Text Solution

    |

  8. Three identical rods AB, CD and PQ are joined as shown. P and Q are mi...

    Text Solution

    |

  9. The temperature drop through each layer of a two layer furnace wall is...

    Text Solution

    |

  10. A rod of length L with sides fully insulated is made of a material who...

    Text Solution

    |

  11. A point source of heat of power P is placed at the centre of a spheric...

    Text Solution

    |

  12. Two identical rods are connected in parallel. One end of the rods is m...

    Text Solution

    |

  13. Radius of a calorimeter is r and depth is l . It is filled completely ...

    Text Solution

    |

  14. If emissivity of bodies X and Y are e(x) and e(y) and absorptive power...

    Text Solution

    |

  15. A sphere of density d, specific heat s and radius r is hung by a therm...

    Text Solution

    |

  16. R(s) d and R(e) are the radius of sun , distance between sun and earth...

    Text Solution

    |

  17. A system S receives heat continuously from an electric heater of power...

    Text Solution

    |

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

    Text Solution

    |

  19. Two bodies P and Q have thermal emissivities of varepsilon(P) and vare...

    Text Solution

    |

  20. The correct curve between log(e) R and log(e) (theta - theta(o)) is -

    Text Solution

    |