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Discussion :: GATE Instrumentation

  1. A tungsten wire used in a constant current hot wire anemometer has the following parameters : 
    Resistance at 0° C is 10Ω, Surface area is 10-4 m2, Linear temperature coefficient of resistance of the tungsten wire is 4.8 * 10-3 /°C, Convective heat transfer coefficient is 25.2W / m2 /°C, flowing air temperature is 30°C, wire current is 100 mA, mass-specific heat product is 2.5 * 10-5 J /°C
    At steady state, the resistance of the wire in Ω is
    2. A.
    10.000
    B.
    10.144
    C.
    12.152
    D.
    14.128

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    Workspace

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    Answer : Option D

    Explanation :

    -NA-

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