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闭合电路的一部分导体在磁场中做切割磁感线的运动时,导体中就产生电流,这种现象叫做电磁感应现象,产生的电流叫做感应电流.导体在磁场中运动时产生感应电流的条件是:切割磁感线的导体是闭合电路的一部分,导体在磁场中一定要做切割磁感线的运动.导体切割磁感线产生的感应电流的方向与导体的运动方向和磁感线的方向有关.在电磁感应现象中,机械能转化为电能.
When a part of a conductor in a closed circuit in a magnetic field cuts the movement of magnetic induction lines, a current is generated in the conductor. This phenomenon is called electromagnetic induction. The generated current is called induced current. The condition for the induced current to flow when a conductor moves in a magnetic field is : The conductor that cuts the magnetic induction line is a part of the closed circuit. The conductor must do the movement of cutting the magnetic induction line in the magnetic field. The direction of the induced current generated by the conductor cutting magnetic induction line is related to the direction of the conductor movement and the direction of the magnetic induction line. In electromagnetic induction, mechanical energy is converted into electrical energy.