【单选题】以下说法中哪一种是正确的? Which of the following statements is true?
A.
电场中某点电场强度的方向,就是试验电荷在该点所受电场力的方向; the direction of the electric field intensity at A certain point in the electric field, is the direction of the electric field force on the test charge at that point
B.
电场中某点电场强度的方向可由 E = F / q 0 确定,其中 q 0 为试验电荷的电量, q 0 可正、可负, F 为试验电荷所受的电场力; the direction of the electric field intensity at a certain point in the electric field can be determined by E = F /q0, where q 0 is the electric charge of the test charge, q 0 can be positive or negative, and F is the electric field force of the test charge
C.
在以点电荷为中心的球面上,由该点电荷所产生的电场强度处处相同; on a sphere centered on a point charge, the intensity of the electric field generated by that point charge is the same everywhere