Last Updated On [03-11-2023]
Consider a vector field given by $x \hat{\imath}+y \hat{\jmath}+z \hat{k}$. This vector field is
(A) divergence-free and curl-free.
(B) curl-free but not divergence-free.
(C) divergence-free but not curl-free.
(D) neither divergence-free nor curl-free.
Question ID - 155498 :- Consider a vector field given by $x \hat{\imath}+y \hat{\jmath}+z \hat{k}$. This vector field is
(A) divergence-free and curl-free.
(B) curl-free but not divergence-free.
(C) divergence-free but not curl-free.
(D) neither divergence-free nor curl-free.
Consider a vector field given by $x \hat{\imath}+y \hat{\jmath}+z \hat{k}$. This vector field is
(A) divergence-free and curl-free.
(B) curl-free but not divergence-free.
(C) divergence-free but not curl-free.
(D) neither divergence-free nor curl-free.
Next Question :
A jet aircraft is initially flying steady and level at its maximum endurance condition. For the aircraft to fly steady and level, but faster at the same altitude, the pilot should
(A) increase thrust alone.
(B) increase thrust and increase angle of attack.
(C) increase thrust and reduce angle of attack.
(D) reduce angle of attack alone.
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