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一、本题共10小题,在每小题给出的四个选项中只有一项是正确的。 1.在+Q点电荷形成的电场中的a、b两点见图1,下列说法正确的是: A.a点的电势一定为正; B.检验电荷q在a点的电势能一定比在b点的电势能大; C.a点的场强一定比b点的场强大; D.检验电荷q由a到b,所受电场力将均匀减小。
A. There are 10 questions in this question. Only one of the four options given in each question is correct. 1. The a and b points in the electric field formed by the +Q point charge are shown in Figure 1. The following statements are correct: The potential at point Aa must be positive; B. The potential energy at charge point q must be greater than that at b. The potential energy of the point is large; the field strength of the Ca point must be stronger than the field of the point b; D. To check the charge q from a to b, the electric field force received will be uniformly reduced.