vanstone

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涡流、电磁阻尼和电磁驱动
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互感和自感
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电磁感应定律的应用
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电磁感应现象的两类情况
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法拉第电磁感应定律
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楞次定律的应用
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楞次定律
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电磁感应
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带电粒子在复合场中的运动
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电表的改装
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把电流表改装成电压表
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探究小灯泡伏安特性曲线
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导体的电阻
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安培力磁感应强度
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磁现象 磁场
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测电池的电动势和内阻
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多用电表的原理及使用
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闭合电路 欧姆定律
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