A positive point charge is moving directly toward point P. The magnetic field that the point charge produces at point P
选项:
A:points from the charge toward point P.;
B:points from point P toward the charge.;
C: is perpendicular to the line from the point charge to point P.;
D:is zero;
E:The answer depends on the speed of the point charge.
发布时间:2024-05-06 22:10:15