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]1803dbaa3e046d6.gif[/img]
A: [img=33x44]1803dbaa46d7a1d.png[/img]
B: [img=26x44]1803dbaa4f99e53.png[/img]
C: [img=77x44]1803dbaa57fe1cf.png[/img]
D: [img=83x44]1803dbaa613685b.png[/img]
A: [img=33x44]1803dbaa46d7a1d.png[/img]
B: [img=26x44]1803dbaa4f99e53.png[/img]
C: [img=77x44]1803dbaa57fe1cf.png[/img]
D: [img=83x44]1803dbaa613685b.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]
- 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]18031799eb2d94a.gif[/img] A: [img=33x44]18031799f3fe07d.png[/img] B: [img=26x44]18031799fc023c4.png[/img] C: [img=77x44]1803179a042ab57.png[/img] D: [img=83x44]1803179a0c7f3aa.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]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]