A) \[U=-2{{x}^{2}}y\]
B) \[U=-2{{x}^{2}}y+\] constant
C) \[U=2{{x}^{2}}y+\] constant
D) not defined
Correct Answer: B
Solution :
[b] \[{{F}_{x}}=-\frac{\partial U}{\partial x}\] or \[{{F}_{y}}=-\frac{\partial U}{\partial x},\] only [b] option satisfies the criteria.
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