# PAF Physics MCQs

## The Vortex Filament, Biot-Savart Law, Helmholtz Theorem MCQs

Solved Physics MCQs of Physics for PAF jobs/

To include the effects of point vortices can the vortex filament equation be modified?
(A). False
(B). True
(C). Partially True
MCQ Answer: b

For computing, the resultant magnetic field Biot-savant law is used.
(A). True
(B). False
(C). Partially True
MCQ Answer: a

Around a closed curve usually, there is integral?
(A). True
(B). False
(C). Partially True
MCQ Answer: c

Helmholtz’s theorems are applied to inviscid flows.
(A). True
(B). False
(C). Partially True
MCQ Answer: a

Vortex tube strength varies with time.
(A). False
(B). True
(C). Partially True
MCQ Answer: a

The vortex filament has a very thin strip.
(A). True
(B). False
(C). Partially True
MCQ Answer: a

To disturbances and tend to roll up the thin strips of vorticity are unstable.
(A). False
(B). True
(C). Partially True
MCQ Answer: b

The circular filament has constant thickness?
(A). True
(B). False
(C). Partially True
MCQ Answer: a

When the sources are invariant in one direction 2D version of the Biot-Savart equation is used.
(A). True
(B). False
(C). Partially True
MCQ Answer: a

Rolling up of the vortex filament has weak external velocity.
(A). True
(B). False
(C). Partially True
MCQ Answer: a