一、楞次定律的意义及拓展楞次定律的意义表现为,他是能量转化守恒定律在电磁感应现象中的体现,能量不可能无中生有,感应电流的电能只能从其他形式的能量转化而来.楞次定律的内容主要强调,感应电流的方向总是使自己的磁场阻碍引起感应电流的磁通量变化.从能量转化守恒定律的角度,可通过具体问题对定律内的 First, the Lenz’s law, the meaning and expansion Lenz’s law, the meaning of performance, he is the law of conservation of energy conversion in the electromagnetic induction phenomenon, the energy can not be absent, the induction current of electricity can only be converted from other forms of energy The content of Lenz’s law mainly emphasizes that the direction of induced current always makes its own magnetic field obstruct the change of the magnetic flux that induces the induced current.From the point of view of conservation of energy transformation,