• 2022-06-08
    有一无限长通有电流的扁平铜片,宽度为a,厚度不计,电流I在铜片上均匀分布,在铜片外与铜片共面、离铜片右边缘为b处的P点(如图)的磁感强度的大小为https://p.ananas.chaoxing.com/star3/origin/b8dbb72a6fbd207cb5ccf9044bb4abe5.pnghttps://p.ananas.chaoxing.com/star3/origin/8297bfa2906fc3cba42b8fa0f87e5847.png