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Standard VII
Physics
Conductor and Insulators
Question

Assertion :Two thin blankets put together are warmer than a single blanket of double the thickness. Reason: Thickness increases because of air layer enclosed between the two blankets.
  1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  3. Assertion is correct but Reason is incorrect
  4. Assertion is incorrect but Reason is correct

A
Assertion is correct but Reason is incorrect
B
Assertion is incorrect but Reason is correct
C
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
D
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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Solution
Verified by Toppr

The correct option is C Assertion is correct but Reason is incorrect
Two thin blankets usually warmer than one thick blanket because air is trapped between them. And the air is bad conductor of heat. It does not pass the heat from our body to surrounding .
Air reduces the conductivity of heat not thickness.
Hence Assertion is correct but reason is wrong.

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