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Question
Physics
Assertion: Perspiration from human body helps in cooling the body. Reason: A thin layer of water on the skin enhances its emissivity.
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Q.
Assertion :
Perspiration from human body helps in cooling the body.
Reason :
A thin layer of water on the skin enhances its emissivity.
AIIMS
AIIMS 2006
Thermal Properties of Matter
A
If both assertion and reason are true and reason is the correct explanation of the assertion
38%
B
If both assertion and reason are true but reason is not the correct explanation of the assertion
6%
C
If assertion is true, but reason is false
42%
D
Both assertion and reason are false statements
15%
Solution:
When water leaves the body through perspiration energy content of molecules remained in body decreases, therefore temperature also decreases. Thus, perspiration from human body helps in cooling the body.