如图所示，一条长导线折成钝角α，导线中通有电流I，则O点的磁感应强度为https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/992848c6d55d4cb0afa345eac3a8a67f.png
举一反三
- 如图所示,一条长导线折成钝角,导线中通有电流I,则O点的磁感应强度为A0BCD
- 一无限长直导线被弯成如图所示的形状，则O点的磁感应强度为https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/26ed09e5ee81475b969298159b46d538.png
- 四条相互平行的载流长直导线电流强度均为I，方向如图所示。设正方形的边长为2a，则正方形中心的磁感应强度为https://image.zhihuishu.com/zhs/onlineexam/ueditor/201910/f5d143e0edec4f0e951b04bbfc978f1f.png
- 8-].如图所示，在被折成钝角的无限长直导线中通有10A的电流。求A点磁感应强度。设d=4cem,
- 无限长直导线在P处弯成半径为R的圆，当通以电流I时，则在圆心O点的磁感强度大小等于<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/247132caa86643248801a9ce73153643.png" /> A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/d6ca935b43b5409982580c397b20452a.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/05df5ede8d854c86adb4aa49ab7d213a.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/fd586a02dd0d48d2a9d8451722bd0cc8.png" /> D: 0 E: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201909/5b15cee769754f5b8d999d9c5bb28961.png" />