Question:-
For an irrotational flow, the velocity potential lines and the streamlines are always
Option (A)
Parallel to each other
Option (B)
Coplanar
Option(C)
Orthogonal to each other
Option(D)
Inclined to the horizontal
Correct Option:
(C)
Question Solution:
Slope of velocity potential = (dy/dx)1 = - (u/v)
Slope of stream line (dy/dx)2 = v/u
(dy/dx)1 x (dy/dx)2 = -(u/v) x v/u) = - 1
Hence they are othergonal to each other
question-answer-faq-5919