Question 1
Question detail
Explain why materials with low thermal conductivity are often used as insulators.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Conservation and dissipation of energy
Question
Explain why materials with low thermal conductivity are often used as insulators.
Answer
Materials with low thermal conductivity are used as insulators because they reduce the rate of energy transfer by conduction, helping to maintain temperature and conserve energy within a system.
Explanation
This question assesses the application of knowledge regarding thermal conductivity in practical contexts, specifically insulation. The answer demonstrates an understanding of how low thermal conductivity contributes to energy conservation.
Common mistake
Confusing thermal conductivity with wall thickness
Students often think that a material’s thermal conductivity alone determines how quickly heat passes through a wall, ignoring the role of wall thickness.
Explain that the rate of heat transfer by conduction is proportional to the material’s thermal conductivity but inversely proportional to the wall’s thickness; both properties together determine the overall heat transfer rate.
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