阿摩線上測驗
39. The electric potential in an xy plane is given byV
. What is the magnitude of the electric field at 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
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統計： A(0), B(1), C(0), D(38), E(0) #2020483
統計： A(0), B(1), C(0), D(38), E(0) #2020483
詳解 (共 1 筆)
面試倒楣鬼-22幸運上後西
#4808294
Ex = dV/dx = 2x = 6 @ x=3m
Ey = dV/dy = -4y = -8 @ y=2m
E = √(62 +82) = 10(D)
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