阿摩線上測驗
52. A charge +q is at the position a and a second charge –q is placed at –a as shown in the
figure. What is the limiting form of the electric field for x ≫ a? (Coulomb’s constant is 
)
(A)
(B)
(C)
(D)
(E)
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統計： A(0), B(4), C(1), D(24), E(4) #2974215
統計： A(0), B(4), C(1), D(24), E(4) #2974215
