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Discussion :: GATE Chemical

  1. Heat is generated at a steady rate of 100 W due to resistance heating in a long wire (length = 5 m, diameter = 2 mm). This wire is wrapped with an insulation of thickness 1 mm that has a thermal conductivity of 0.1 W/m.K. The insulated wire is exposed to air at 30°C. The convective heat transfer between the wire and surrounding air is characterized by a heat transfer coefficient of 10 W/m2.K. The temperature (in °C) at the interface between the wire and the insulation is
    2. A.
    211.2
    B.
    242.1
    C.
    311.2
    D.
    484.2

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    Answer : Option A

    Explanation :

    -NA-

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