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When two ends of a rod wrapped with cott...

When two ends of a rod wrapped with cotton are maintained at differences and after some time every point of the rod attains a constant temperature, then

A

Condition of heat at different points of the rod stops becasuse the temperature is not increasing

B

rod is bad conductor of heat

C

heat is being radiated from each point of the rod

D

each point of the rod is giving heat to its neighbour at the same rate at which it is receving heat

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • When two ends of a rod wrapped with cotton are maintained at different temperatures and after some time every point of the rod attains a constant temperature, then

    A
    Conduction of heat at different points of the rod stops because the temperature is not increasing
    B
    Rod is bad conductor of heat
    C
    Heat is being radiated from each point of the rod
    D
    Each point of the rod is giving heat to its neighbour at the same rate at which it is receiving heat

  • Two ends of area A of a uniform rod of thermal conductivity k are maintained at different but constant temperatures. At any point on the rod, the temperature gradient is (dT)/(dl) . If I be the thermal current in the rod, then:

    A
    `I prop A`
    B
    `I prop (dT)/(dl)`
    C
    `I prop A^(@)`
    D
    `I prop(1)/(((dT)/(dl))`

  • The two ends of uniform rod of thermal conductivity K are maintained at different but constant temperatre. The temperature gradient at any point on the rod is d theta // dx . The heat flow per unit time per unit cross-section of the rod is I . (i) (d theta)/(dx) is the same for all point on the rod (ii) I = K (d theta)/(dx)

    A
    (i) only
    B
    (ii) only
    C
    (i), (ii)
    D
    none
    • CP SINGH-HEAT TRANSFER-Exercises
    1. When two ends of a rod wrapped with cotton are maintained at differenc...

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    2. The thermal conductivity of a rod depends on

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    3. One end of a metal rod is kept in a furnace. In steady state, the temp...

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    4. In a room containing air, heat can go from one place to another

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    5. The two ends of uniform rod of thermal conductivity K are maintained a...

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    6. Which of the following circular rods (given radius r and length l) eac...

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    7. Two rods A and B are of equal lengths. Their ends of kept between the ...

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    8. The temperature gradient in a rod of 0.5 m length is 80^(@)C//m. It th...

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    9. A cylindrical rod having temperature T(1) and T(2) at its ends. The ra...

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    10. The heat is flowing through two cylinderical rods of same material. Th...

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    11. Two identical vessels are filled with equal amounts of ice. The vessel...

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    12. One end of a themally insulated copper rod of length 1 m long and of 1...

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    13. A glass window conducts out a certain quantity of heat per second when...

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    14. Two walls of thicknes l(1) and l(2) and ther-mal condctivities K(1) an...

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    15. A slab consists of two layers of different materials of the same thick...

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    16. Two rods of the same length and diameter, having thermal conductivitie...

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

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

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    19. A long metallic bar is carrying heat from one of its ends to the other...

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    20. A and B are two points on uniform metal ring whose centre is O The ang...

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