阿摩線上測驗
9. The figure shows three electric charges labeled Q1, Q2, Q3, and some
electric field lines in the region surrounding the charges. What are the
signs of the three charges?
(A) Q1 is negative, Q2 is positive, Q3 is negative.
(B) Q1 is positive, Q2 is positive, Q3 is negative.
(C) Q1 is positive, Q2 is negative, Q3 is positive.
(D) Q1 is positive, Q2 is negative, Q3 is negative.
(E) Q1 is negative, Q2 is negative, Q3 is negative.
答案：登入後查看
統計： A(0), B(0), C(4), D(0), E(1) #3429528
統計： A(0), B(0), C(4), D(0), E(1) #3429528
