Shown below are qualitative illustrations of the lift curve for an airfoil when two
different control surfaces are in their respective retracted and deployed
configurations. Which of the following is/are TRUE?
Options:
(A) Figure P is for a flap
(B) Figure P is for a slat
(C) Figure Q is for a slat
(D) Figure Q is for a flap
Official Answer Key:
A
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2026 Q.25)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Incompressible & Compressible Aerodynamics** under *Aerodynamics & Fluid Mechanics* (1 Mark, MCQ).
**2. Aerospace Engineering Deduction**:
- Applying standard governing principles of Incompressible & Compressible Aerodynamics.
- Option **(A)** matches the analytical derivation and official criteria.
**3. Final Answer**:
Correct Option is **(A)**.
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