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Assertion : Perspiration from human body...

Assertion : Perspiration from human body helps in cooling the body.
Reason : A thin layer of water on the skin enhances its emissivity.

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion.

B

if both assertion and reason are true but reason is not the correct expalanation of the assertion

C

if assertion is true , but reason is false

D

both assertion and reason are false statements.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze both the assertion and the reason provided. ### Step-by-Step Solution: 1. **Understanding the Assertion**: - The assertion states: "Perspiration from the human body helps in cooling the body." - This is true. Perspiration (sweating) is a physiological process where sweat evaporates from the skin surface, taking heat away from the body. This process is known as evaporative cooling. 2. **Understanding the Reason**: - The reason states: "A thin layer of water on the skin enhances its emissivity." - This statement is incorrect. Emissivity refers to the ability of a surface to emit thermal radiation. A thin layer of water on the skin actually decreases emissivity because water has a high heat capacity and reflects some thermal radiation rather than emitting it effectively. 3. **Conclusion**: - Since the assertion is true and the reason is false, we can conclude that the correct relationship is that the assertion is true, but the reason is false. 4. **Final Answer**: - The correct option is that the assertion is true and the reason is false.
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