For air at a given temperature, as the relative humidity

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For air at a given temperature, as the relative humidity is increased isothermally,

1. the wet bulb temperature and specific enthalpy increase
2. the wet bulb temperature and specific enthalpy decrease
3. the wet bulb temperature increases and specific enthalpy decreases
4. the wet bulb temperature decreases and specific enthalpy increases

Correct Option: A

DBT = DBT₂
DBT →
φ ↑, Twb ↓
Relative humidity is increased isothermally.