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楞次定律

楞次定律. 对线圈插入、拔出时导体环中的电流的猜测. N /. N /. N /. N /. S /. S /. S /. S /. N. G. S. +. 对线圈中感应电流方向研究. G. G. +. +. 研究电表指针偏转方向与电流方向的关系. 试触. 变阻器限流. N. N. N. N. S. S. S. S. 对线圈中感应电流方向研究. 对线圈中感应电流方向研究. 结论： 当线圈内磁通量增加时，感应电流的磁场 B ＇ 的方向与原磁场 B 0 的方向相反 →感应电流的磁场阻碍磁通量的增加

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楞次定律

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  1. 楞次定律

  2. 对线圈插入、拔出时导体环中的电流的猜测 N/ N/ N/ N/ S/ S/ S/ S/

  3. N G S + 对线圈中感应电流方向研究

  4. G G + + 研究电表指针偏转方向与电流方向的关系 试触 变阻器限流

  5. N N N N S S S S 对线圈中感应电流方向研究

  6. 对线圈中感应电流方向研究 结论： 当线圈内磁通量增加时，感应电流的磁场B＇的方向与原磁场B0的方向相反 →感应电流的磁场阻碍磁通量的增加 当线圈内磁通量减少时，感应电流的磁场B＇的方向与原磁场B0的方向相同 →感应电流的磁场阻碍磁通量的减少 老子：“天之道，损有余而补不足”

  7. 楞次定律 楞次定律 感应电流具有这样的方向，即感应电流的磁场总是要阻碍引起感应电流的磁通量的变化。 There is an induced current in a closed conducting loop if and only if the magnetic flux through the loop is changing. The direction of the induced current is such that the induced magnetic field always opposes the change in the flux.

  8. 对“阻碍”的理解 “阻碍”是指感应电流的磁场阻碍原来磁场磁通量的增加或减少。 “阻碍”不是阻止，而是延缓了磁通量的变化过程。

  9. 运用楞次定律解题的一般步骤 判定原磁场的方向 判定磁通量的变化情况 楞次定律 判定感应电流的磁场方向 安培定则 判定感应电流的方向 明确研究对象

  10. 运用楞次定律解释实验现象

  11. 对楞次定律的理解 从磁通量变化的角度来看，感应电流的磁场总要阻碍原磁通量的变化； 从导体和磁体的相对运动来看，感应电流的磁场总要阻碍相对运动。 李商隐：相见时，难！别，亦难！ 思考：在电磁感应过程中能量如何变化

  12. STS S N 轨道 感应电流 磁悬浮

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