Discussion :: Physics
- Woollen cloth protects the body from cold because
|
A.
It is a good conductor of heat |
|
B.
It is a poor conductor of heat |
|
C.
External heat rays enter into the body through the woollen cloth |
|
D.
It reflects heat |
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Answer : Option B
Explanation :
Cotton clothes are thin and do not have space in which air can be trapped. Thus, cotton clothes do not prevent heat coming out of our body. Woollen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibres.
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