Question:
Dew point is:
Dew point is:
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Dew point: temperature for condensation.
Relative humidity is 100% at dew point.
Relative humidity is 100% at dew point.
Updated On: Aug 18, 2026
- Temperature at which the relative humidity is 60%
- Temperature at which condensation of water vapour in air starts
- Temperature at which ice sublimates
- Minimum temperature during night which causes morning dew
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Dew point is a fundamental concept in psychrometry.
It relates to condensation of water vapour.
Step 2: Key Formula or Approach:
No specific formula.
Need to understand the definition of dew point.
Step 3: Detailed Explanation:
Dew point is the temperature at which condensation of water vapour in air starts.
At this temperature, air becomes saturated with water vapour.
Relative humidity is 100% at the dew point.
It is not a fixed temperature (like 60% RH).
It is not about sublimation.
Thus, the correct definition is the temperature at which condensation starts.
Step 4: Final Answer:
Dew point is the temperature at which condensation of water vapour in air starts.
Hence, the correct option is (B).
Dew point is a fundamental concept in psychrometry.
It relates to condensation of water vapour.
Step 2: Key Formula or Approach:
No specific formula.
Need to understand the definition of dew point.
Step 3: Detailed Explanation:
Dew point is the temperature at which condensation of water vapour in air starts.
At this temperature, air becomes saturated with water vapour.
Relative humidity is 100% at the dew point.
It is not a fixed temperature (like 60% RH).
It is not about sublimation.
Thus, the correct definition is the temperature at which condensation starts.
Step 4: Final Answer:
Dew point is the temperature at which condensation of water vapour in air starts.
Hence, the correct option is (B).
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