Gce Model Questions Vol1 2024 Physics Question 34
Practice objective / multiple choice question 34 from the 2024 Gce Model Questions Vol1 Physics examination.
A wall consists of two layers in series covering an area of \(1\ \text{m}^{2}\). The inner layer is brick with thermal conductivity \(k_{b}=0.72\ \text{W m}^{-1}\text{K}^{-1}\) and thickness \(0.15\ \text{m}\). The outer layer is an insulating material with conductivity \(k_{i}=0.04\ \text{W m}^{-1}\text{K}^{-1}\) and unknown thickness \(d_{i}\). The temperature on the inner surface is \(20^{\circ}\text{C}\) and on the outer surface is \(-5^{\circ}\text{C}\). The measured steady‑state heat loss through the wall is \(30\ \text{W}\). Determine the required thickness \(d_{i}\) of the insulating layer in centimetres.
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About This Question
This is Gce Model Questions Vol1 2024 Physics Question 34. It is one of the objective questions from the 2024 Gce Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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