Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Generated Voltage from Changing B

由变化的磁通量产生的电压

The induced emf (generated voltage) can be calculated from Faraday's Law. According to Lenz's Law the induced current in the coil produces a magnetic field to oppose the change in magnetic field which produced it. Observing the direction of the change in the magnetic field of the bar magnet, you know that the induced current will produce a magnetic field in the opposite direction called the induced field. If you put the fingers of your right hand inside the coil in the direction of that induced field, the thumb points in the direction the current must flow to produce the field.

感应电动势（产生的电压）可以通过法拉第定律计算。根据楞次定律，线圈中的感应电流会产生一个磁场，以对抗产生该磁场的变化。观察条形磁铁磁场的变化方向，你可以知道感应电流会产生一个相反方向的磁场，称为感应磁场。如果你将右手的食指指向该感应磁场的方向，拇指则指向电流必须流动的方向以产生该磁场。
Field of current loop
电流环的场
 Index

Magnetic field concepts

Currents as magnetic sources
索引 磁场概念 电流作为磁场源
  HyperPhysics***** Electricity and Magnetism
HyperPhysics ***** 电学和磁学
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Generated Voltage from Changing B

由变化的磁通量产生的电压

The induced emf (generated voltage) can be calculated from Faraday's Law. According to Lenz's Law the induced current in the coil produces a magnetic field to oppose the change in magnetic field which produced it. Observing the direction of the change in the magnetic field of the bar magnet, you know that the induced current will produce a magnetic field in the opposite direction called the induced field. If you put the fingers of your right hand inside the coil in the direction of that induced field, the thumb points in the direction the current must flow to produce the field.

感应电动势（产生的电压）可以通过法拉第定律计算。根据楞次定律，线圈中的感应电流会产生一个磁场，以对抗产生该磁场的变化。观察条形磁铁磁场的变化方向，你可以知道感应电流会产生一个相反方向的磁场，称为感应磁场。如果你将右手的食指指向该感应磁场的方向，拇指则指向电流必须流动的方向以产生该磁场。
Field of current loop
电流环的场
 Index

Magnetic field concepts

Currents as magnetic sources
索引 磁场概念 电流作为磁场源
  HyperPhysics***** Electricity and Magnetism
HyperPhysics ***** 电学和磁学
 Go Back
返回





Generated Voltage from Changing B

由变化的磁通量产生的电压

The induced emf (generated voltage) can be calculated from Faraday's Law. According to Lenz's Law the induced current in the coil produces a magnetic field to oppose the change in magnetic field which produced it. Observing the direction of the change in the magnetic field of the bar magnet, you know that the induced current will produce a magnetic field in the opposite direction called the induced field. If you put the fingers of your right hand inside the coil in the direction of that induced field, the thumb points in the direction the current must flow to produce the field.

感应电动势（产生的电压）可以通过法拉第定律计算。根据楞次定律，线圈中的感应电流会产生一个磁场，以对抗产生该磁场的变化。观察条形磁铁磁场的变化方向，你可以知道感应电流会产生一个相反方向的磁场，称为感应磁场。如果你将右手的食指指向该感应磁场的方向，拇指则指向电流必须流动的方向以产生该磁场。
Field of current loop
电流环的场
 Index

Magnetic field concepts

Currents as magnetic sources
索引 磁场概念 电流作为磁场源
  HyperPhysics***** Electricity and Magnetism
HyperPhysics ***** 电学和磁学
 Go Back
返回





Generated Voltage from Changing B

由变化的磁通量产生的电压

The induced emf (generated voltage) can be calculated from Faraday's Law. According to Lenz's Law the induced current in the coil produces a magnetic field to oppose the change in magnetic field which produced it. Observing the direction of the change in the magnetic field of the bar magnet, you know that the induced current will produce a magnetic field in the opposite direction called the induced field. If you put the fingers of your right hand inside the coil in the direction of that induced field, the thumb points in the direction the current must flow to produce the field.

感应电动势（产生的电压）可以通过法拉第定律计算。根据楞次定律，线圈中的感应电流会产生一个磁场，以对抗产生该磁场的变化。观察条形磁铁磁场的变化方向，你可以知道感应电流会产生一个相反方向的磁场，称为感应磁场。如果你将右手的食指指向该感应磁场的方向，拇指则指向电流必须流动的方向以产生该磁场。
Field of current loop
电流环的场
 Index

Magnetic field concepts

Currents as magnetic sources
索引 磁场概念 电流作为磁场源
  HyperPhysics***** Electricity and Magnetism
HyperPhysics ***** 电学和磁学
 Go Back
返回