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# The wall with a cavity consists of two layers of brick separated by a layer of air. All three layers have the same thickness and the thermal conductivity of the brick is much greater than that of air. The left layer is at a higher temperature than the right layer and steady state condition exists. Which of the following graphs predicts correctly the variation of temperature T with distance d inside the cavity?(A) (B)(C) (D)

Last updated date: 17th Jun 2024
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Hint
We should know that heat energy is defined as the result of the movement of tiny particles which are called atoms, molecules or ions in the solids, liquids and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat. The heat is very important in our daily life in warming the house, cooking, heating the water and drawing the wash clothes. The heat has many uses in the industry as making and processing the food and manufacture of the glass, the paper, the textile, etc.

$\dfrac{dQ}{dt}=KA\dfrac{d\theta }{dx}$
$\dfrac{d\theta }{dx}=\text{ slope of graph }\alpha \dfrac{1}{K}$
Here $Q$ is the heat energy, $K$ is temperature constant.