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
A: [img=33x44]18033a9b80ff7fe.png[/img]
B: [img=26x44]18033a9b88b4242.png[/img]
C: [img=83x44]18033a9b90d9552.png[/img]
D: 0
举一反三
- 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
- 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=560x303]18030072ea130e2.jpg[/img] A: [img=33x44]18030072f3113b2.png[/img] B: [img=33x44]18030072faf308e.png[/img] C: [img=83x44]1803007302ca78d.png[/img] D: [img=83x44]180300730bcad58.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=560x303]1803251c49f22b1.jpg[/img] A: [img=33x44]1803251c52d4dea.png[/img] B: [img=33x44]1803251c5c0934c.png[/img] C: [img=83x44]1803251c6427045.png[/img] D: [img=83x44]1803251c6d0c51d.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=560x303]1803d3a70f94499.jpg[/img] A: [img=33x44]1803d3a7184ec09.png[/img] B: [img=33x44]1803d3a72114f3b.png[/img] C: [img=83x44]1803d3a72a0bb00.png[/img] D: [img=83x44]1803d3a732896f1.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=560x303]1803be8f18c1ae7.jpg[/img] A: [img=33x44]1803be8f217ef74.png[/img] B: [img=33x44]1803be8f2abef68.png[/img] C: [img=83x44]1803be8f328a527.png[/img] D: [img=83x44]1803be8f3b092eb.png[/img]