Input
Output
Evaluation Input Image

<image 1>The accompanying sketch shows the schematic arrangement for measuring the thermal conductivity by the guarded hot plate method. Two similar 1 cm thick specimens receive heat from a 6.5 cm by 6.5 cm guard heater. When the power dissipation by the wattmeter was 15 W, the thermocouples inserted at the hot and cold surfaces indicated temperatures as 325 K and 300 K. What is the thermal conductivity of the test specimen material?



(A) 0.81 W/m K


(B) 0.71 W/m K


(C) 0.61 W/m K


(D) 0.51 W/m K


Answer with the option's letter from the given choices directly. No punctuation.


(A)


Expected Answer: B

Difficulty: Hard

Subfield: Heat Transfer

Evaluation

Evaluation ID
8c7cd30d-1b8b-4bbd-9283-14a2e6b5b8df
Created
February 21, 2024
Raw Output
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