Energy in an Inductor
电感中的能量
When a electric current is flowing in an inductor, there is energy stored in the magnetic field. Considering a pure inductor L, the instantaneous power which must be supplied to initiate the current in the inductor is
电流流过电感器时，能量储存在磁场中。对于电感为L的理想电感器，建立电流所需提供的瞬时功率为
so the energy input to build to a final current i is given by the integral
因此，建立到最终电流i所需的能量输入由积分给出
Using the example of a solenoid, an expression for the energy density can be obtained.
以螺线管为例，可以得到能量密度的表达式。
Inductance concepts
Capacitance concepts
索引 电感概念 电容概念
| HyperPhysics***** Electricity and Magnetism
HyperPhysics ***** 电学和磁学 | R Nave |
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