Physics MCQs pdf download

By: Prof. Dr. Fazal Rehman | Last updated: May 20, 2025

1. What does Kelvin’s Circulation Theorem state in an inviscid and barotropic flow?
(A) Circulation increases with time
(B) Circulation remains constant
(C) Circulation decreases due to viscosity
(D) Circulation depends on turbulence

2. Which assumption is NOT required for Kelvin’s Circulation Theorem to be valid?
(A) Inviscid fluid
(B) Barotropic condition
(C) Conservative body forces
(D) High viscosity

3. What is the nature of circulation in a closed fluid loop according to Kelvin’s Theorem?
(A) Zero circulation at all times
(B) Linearly increasing circulation
(C) Constant circulation
(D) Variable due to temperature

4. The starting vortex is generated due to which of the following?
(A) Flow around the leading edge
(B) Viscous effects near the trailing edge
(C) Rotational flow at stagnation point
(D) Lift at high angles of attack

5. The starting vortex forms when an airfoil:
(A) Is at rest
(B) Begins to move
(C) Reaches sonic speed
(D) Loses lift

6. The bound vortex is associated with:
(A) The airfoil’s surface
(B) The free-stream flow
(C) The far wake
(D) The stagnation point

7. What does the starting vortex ensure according to the circulation theory of lift?
(A) Downwash is eliminated
(B) Bound vortex forms on the wing
(C) Lift is zero
(D) Wake turbulence disappears

8. The total circulation in the system of a starting vortex and a bound vortex is:
(A) Maximum
(B) Infinite
(C) Zero
(D) Equal to lift

9. The starting vortex travels:
(A) Along the surface of the airfoil
(B) Into the wake downstream
(C) Toward the leading edge
(D) Around the tip vortices

10. Which of the following is a result of the starting vortex in steady flight?
(A) Destruction of lift
(B) Creation of turbulence
(C) Generation of a constant bound vortex
(D) Induction of pitching moment