论文部分内容阅读
问题47.在学习电磁场和电磁波时,变化的电场产生磁场、变化的磁场产生电场,为什么变化的电场不产生
Question 47. When studying electromagnetic fields and electromagnetic waves, the changing electric field produces a magnetic field. The changing magnetic field produces an electric field. Why the changed electric field does not occur