无限长直圆柱体，半径为R，沿轴向均匀流有电流. 设圆柱体内(r R)的磁感强度大小为[img=20x22]1803d3ab79d1650.png[/img]，圆柱体外(r R)的磁感强度大小为[img=20x22]1803d3ab81a0f65.png[/img]，则有：
A: [img=20x22]1803d3ab8a06b0b.png[/img]、[img=20x22]1803d3ab923f4fc.png[/img]均与r成正比
B: [img=20x22]1803d3ab8a06b0b.png[/img]、[img=20x22]1803d3ab923f4fc.png[/img]均与r成反比
C: [img=20x22]1803d3ab8a06b0b.png[/img]与r成正比, [img=20x22]1803d3ab923f4fc.png[/img]与r成反比
D: [img=20x22]1803d3ab8a06b0b.png[/img]与r成反比,[img=20x22]1803d3ab923f4fc.png[/img]与r成正比
A: [img=20x22]1803d3ab8a06b0b.png[/img]、[img=20x22]1803d3ab923f4fc.png[/img]均与r成正比
B: [img=20x22]1803d3ab8a06b0b.png[/img]、[img=20x22]1803d3ab923f4fc.png[/img]均与r成反比
C: [img=20x22]1803d3ab8a06b0b.png[/img]与r成正比, [img=20x22]1803d3ab923f4fc.png[/img]与r成反比
D: [img=20x22]1803d3ab8a06b0b.png[/img]与r成反比,[img=20x22]1803d3ab923f4fc.png[/img]与r成正比
举一反三
- 无限长直圆柱体，半径为R，沿轴向均匀流有电流. 设圆柱体内(r [ R)的磁感强度大小为[img=20x22]18039a06b1ecdd1.png[/img]，圆柱体外(r ]R)的磁感强度大小为[img=20x22]18039a06b9a587b.png[/img]，则有： A: [img=20x22]18039a06c10622c.png[/img]、[img=20x22]18039a06c8c6b09.png[/img]均与r成正比 B: [img=20x22]18039a06c10622c.png[/img]、[img=20x22]18039a06c8c6b09.png[/img]均与r成反比 C: [img=20x22]18039a06c10622c.png[/img]与r成正比, [img=20x22]18039a06c8c6b09.png[/img]与r成反比 D: [img=20x22]18039a06c10622c.png[/img]与r成反比,[img=20x22]18039a06c8c6b09.png[/img]与r成正比
- 无限长直圆柱体，半径为R，沿轴向均匀流有电流. 设圆柱体内(r [ R)的磁感强度大小为[img=20x22]18031e4dd424e98.png[/img]，圆柱体外(r ]R)的磁感强度大小为[img=20x22]18031e4ddde70e2.png[/img]，则有： A: [img=20x22]18031e4de666962.png[/img]、[img=20x22]18031e4def0986a.png[/img]均与r成正比 B: [img=20x22]18031e4de666962.png[/img]、[img=20x22]18031e4def0986a.png[/img]均与r成反比 C: [img=20x22]18031e4de666962.png[/img]与r成正比, [img=20x22]18031e4def0986a.png[/img]与r成反比 D: [img=20x22]18031e4de666962.png[/img]与r成反比,[img=20x22]18031e4def0986a.png[/img]与r成正比
- 无限长直圆柱体，半径为R，沿轴向均匀流有电流. 设圆柱体内(r [ R)的磁感强度大小为[img=20x22]18037e7b894274b.png[/img]，圆柱体外(r ]R)的磁感强度大小为[img=20x22]18037e7b929c5cb.png[/img]，则有： A: [img=20x22]18037e7b9af6438.png[/img]、[img=20x22]18037e7ba4548cf.png[/img]均与r成正比 B: [img=20x22]18037e7b9af6438.png[/img]、[img=20x22]18037e7ba4548cf.png[/img]均与r成反比 C: [img=20x22]18037e7b9af6438.png[/img]与r成正比, [img=20x22]18037e7ba4548cf.png[/img]与r成反比 D: [img=20x22]18037e7b9af6438.png[/img]与r成反比,[img=20x22]18037e7ba4548cf.png[/img]与r成正比
- 无限长直圆柱体，半径为R，沿轴向均匀流有电流. 设圆柱体内(r [ R)的磁感强度大小为[img=20x22]1803d398b3102d8.png[/img]，圆柱体外(r ]R)的磁感强度大小为[img=20x22]1803d398bb932f5.png[/img]，则有： A: [img=20x22]1803d398c40e4ca.png[/img]、[img=20x22]1803d398cd62c7f.png[/img]均与r成正比 B: [img=20x22]1803d398c40e4ca.png[/img]、[img=20x22]1803d398cd62c7f.png[/img]均与r成反比 C: [img=20x22]1803d398c40e4ca.png[/img]与r成正比, [img=20x22]1803d398cd62c7f.png[/img]与r成反比 D: [img=20x22]1803d398c40e4ca.png[/img]与r成反比,[img=20x22]1803d398cd62c7f.png[/img]与r成正比
- 无限长直圆柱体，半径为R，沿轴向均匀流有电流. 设圆柱体内(r [ R)的磁感强度大小为[img=20x22]1803006f19fed3b.png[/img]，圆柱体外(r ]R)的磁感强度大小为[img=20x22]1803006f21a39f8.png[/img]，则有： A: [img=20x22]1803006f298750b.png[/img]、[img=20x22]1803006f31548d0.png[/img]均与r成正比 B: [img=20x22]1803006f298750b.png[/img]、[img=20x22]1803006f31548d0.png[/img]均与r成反比 C: [img=20x22]1803006f298750b.png[/img]与r成正比, [img=20x22]1803006f31548d0.png[/img]与r成反比 D: [img=20x22]1803006f298750b.png[/img]与r成反比,[img=20x22]1803006f31548d0.png[/img]与r成正比