Question
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 /°CAt steady state, the resistance of the wire in Ω is
temperature is 30°C, wire current is 100 mA, mass-specific heat product is 2.5 * 10-5 J /°CAt steady state, the resistance of the wire in Ω is
Answer: Option D
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