問題詳情

39. The electric potential in an xy plane is given byV

. What is the magnitude of the electric fieldat the point (3.0 m, 2.0 m)?
(A)5.0 N /C
(B)6.0 N /C
(C)8.0 N /C
(D)10 N /C
(E)14 N /C



參考答案