Because the total self-inductance coefficient is the sum of all the solenoids? Coefficients, the formulas are not valid in same of opposite directions.
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.
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。
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