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点的磁感应强度大小等于[ ]。[img=98x70]18035941b6aab4f.png[/img]
A: [img=33x44]18035941bf1f8c5.png[/img]
B: [img=26x44]18035941c809120.png[/img]
C: 0
D: [img=95x51]18035941d119bfa.png[/img]
E: [img=89x51]18035941df6618e.png[/img]
A: [img=33x44]18035941bf1f8c5.png[/img]
B: [img=26x44]18035941c809120.png[/img]
C: 0
D: [img=95x51]18035941d119bfa.png[/img]
E: [img=89x51]18035941df6618e.png[/img]
举一反三
- 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点的磁感应强度大小等于[ ]。[img=98x70]18031eb892867fe.png[/img] A: [img=33x44]18031eb89b6a7cf.png[/img] B: [img=26x44]18031eb8a34611b.png[/img] C: 0 D: [img=95x51]18031eb8ab63d30.png[/img] E: [img=89x51]18031eb8b8024df.png[/img]
- 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点的磁感应强度大小等于[ ]。[img=98x70]1803d925f00ad3e.png[/img] A: [img=33x44]1803d925f901bb1.png[/img] B: [img=26x44]1803d92601b2722.png[/img] C: 0 D: [img=95x51]1803d9260927cd0.png[/img] E: [img=89x51]1803d92616cf36b.png[/img]
- 如图所示，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=122x89]18033a9b78472b4.bmp[/img] A: [img=33x44]18033a9b80ff7fe.png[/img] B: [img=26x44]18033a9b88b4242.png[/img] C: [img=83x44]18033a9b90d9552.png[/img] D: 0
- 如图所示，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=122x89]180329ea41320bf.bmp[/img] A: [img=33x44]180329ea498d67b.png[/img] B: [img=26x44]180329ea51d9071.png[/img] C: [img=83x44]180329ea59cee95.png[/img] D: 0
- 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=105x81]1803dbaac625546.gif[/img] A: [img=33x44]1803dbaacfb935a.png[/img] B: [img=26x44]1803dbaad80d921.png[/img] C: [img=77x44]1803dbaadfb0da2.png[/img] D: [img=83x44]1803dbaae83ad97.png[/img]