![](https://lstatic.shangxueba.com/sxbzda/h5/images/m_q_title.png)
[单选题]
半限长通电直导线,电流为I,则它的磁场强度分布公式为()
A.{**{1593417833627_9_79_55.png}**}
B.{**{1593417910280_28_59_53.png}**}
C.aA
D.{**{1593418154208_30_60_53.png}**}
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)
A.{**{1593417833627_9_79_55.png}**}
B.{**{1593417910280_28_59_53.png}**}
C.aA
D.{**{1593418154208_30_60_53.png}**}
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!