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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

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