A beggar wrapped himself with a few layers of newspaper on a cold winter night. This helped him to keep himself warm because
A
Friction between the layers of newspaper produces heat.
B
Air trapped between the layers of newspaper is a bad conductor of heat.
C
Newspaper is at a higher temperature than the temperature of the surrounding.
D
Newspaper is a conductor of heat.
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Solution
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Correct option is B. Air trapped between the layers of newspaper is a bad conductor of heat. The correct answer is option (b) Air trapped among the layers of newspaper is a poor conductor of heat. So. this helps him to keep himself warm.
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