Solve the problem.
-$$\text { The flow } \mathrm { F } \text { of a fluid in a plane is illustrated below. At which point or points would } \nabla \times \mathrm { F } \text { point out from the }$$

A) C
B) B
C) A
D) A and C

Question

Solve the problem.
-$$\text { The flow } \mathrm { F } \text { of a fluid in a plane is illustrated below. At which point or points would } \nabla \times \mathrm { F } \text { point out from the }$$

A) C 
B) B 
C) A 
D) A and C

Quizplus · Accepted Answer

Using the right-hand rule, we can determine that the direction of the curl of $\mathrm{F}$ is upwards (out of the plane of the paper) at point C. This is because the circulation of $\mathrm{F}$ around an infinitesimal loop in the counterclockwise direction is positive, which means that $
abla 	imes \mathrm{F}$ is in the upwards direction. At points A and B, the circulation around an infinitesimal loop is zero, so the curl of $\mathrm{F}$ is zero as well. Therefore, the answer is only C.

Solve the Problem A) C B) B C) a D) a and C

Solve the Problem A) C
B) B
C) a
D) a and C