Menu
Home / GATE 2017-2018 / GATE Instrumentation :: Discussion

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
    The thermal time constant of the hot wire under flowing air condition in ms is
    2. A.
    24.5
    B.
    12.25
    C.
    6.125
    D.
    3.0625

    View Answer

    Workspace

    View Answer

    Answer : Option B

    Explanation :

    -NA-

Write your comments here:

Be The First To Comment