學士後西醫-物理題庫下載題庫

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)