自感系数表示线圈产生自感能力的物理量，常用L来表示。简称自感或电感。自感系数的单位是亨利，简称亨，符号是H。
... coefficient of rolling friction滚动磨擦系数 coefficient of self induction自感系数 coefficient of sliding friction滑动摩擦系数 ...
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... inductance self-induction 自感应 self-induction phenomenon 自感系数 ; 自感应现象 apparent self-induction 视在自感应 ...
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自感系数（coefficient of self-inductance）L= const.L 称自感系数（电感量） ，形状、 尺寸、L的单位：为保证L > 0， 规定ψ 的正向与i 的正向成右手螺旋关系。
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指出在无磁介质存在的条件下，实际导体回路的自感系数也与电流频率有关。
It is pointed out that the self-induction coefficient is relative to the current frequency in the actual conductor circuit, even if there is not any magnetic medium.
串联后的总自感系数等于各螺线管自感系数之和，所以顺接和反接公式都不成立。
Because the total self-inductance coefficient is the sum of all the solenoids? Coefficients, the formulas are not valid in same of opposite directions.
通过对互感和自感系数两种定义式的讨论，找出两种定义式的内在区别和适应的条件。
By debating about the two definitions of inter-induction coefficient and self-induction coefficient, we can discover the internal difference and the suitable condition.
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