問題詳情

38. Which of the following expressions is a static electric field
(A)

=(2xy,-2yz,-y2)
(B)

=(2z,-2yz,-x2)
(C)

=(2x,-2yz,-y2)
(D)

=(yz,yz,yz)
(E)

=(2xy-3,2x2,0)

參考答案

答案：C

統計：A:0,B:1,C:0,D:0,E:0

難度：計算中