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UPSC Civil Service Exam Questions

Q1: Which one of the following can be a set of velocity components of a two-dimensional flow ?

A u = x + y and v = x2 + y2

B u = x + y and v = x - y

C
u = xy and

D u = x2 + y2 and v = x2 - y2

ANS:B - u = x + y and v = x - y

du/dx +dv/dy =0.

Only B fulfil that hence the answer is option B.



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