一、单选题 1.关于电场强度的说法,正确的是 A.由E=F勺知,场强E跟F成正比,跟q成反比B.电场中某点的场强E可用检验电荷q来量度,但E和q的正负、大小无关 C.电场中某点的场强E,就是单位正电荷放在该点受到的电场力D.电场中某点的场强方向,就是检验电荷放在该点时受到的电场力方向 First, the single-topic 1. On the electric field strength of the argument is correct A. By E = F spoon know, field strength E is proportional to F, and inversely proportional to q B. Electric field strength of a point E can be used to test the charge q to measure, but E and q positive and negative, the size has nothing to do C. The electric field strength of a point E, is the unit of positive charge on the electric field force at this point D. The electric field in the direction of the field strength is the test The direction of the electric field force that the electric charge receives at this point