A Wall Has Two Layers of Materials a and B;

question 19

Multiple Choice

A wall has two layers of materials A and B; each made of a different material. Both the layers have the same thickness. The thermal conductivity of material A is twice that of B. Under the equilibrium, the temperature difference across the wall is 36°C. The temperature difference across the layer A is __________ °C.

• A)6
• B)12
• C)18
• D)24

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Definitions:

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Months of Age

A method of expressing the age of infants and very young children by the number of months since birth.

Withdrawn Child

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A temperament trait in which an individual is initially hesitant or cautious in new situations but becomes more comfortable with time.