山西省忻州市第一中学高中物理第五章交变电流单元复习预习案(无答案)新人教版选修3_2.doc

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1交变电流单元复习【教学目标】1通过复习和总结,整合本章知识,形成系统知识结构。2注重理论联系实际及前后知识的关联,扩展知识视野。【预习任务】一、交变电流1交变电流的定义:2正余弦交变电流的产生:3正余弦交变电流的表达式:4描述交变电流的物理量:5电感、电容对交变电流的影响:二、理想变压器1结构:2原理和特点:3基本规律(1)原副线圈的频率关系:(2)原副线圈中电压与匝数关系:(3)原副线圈中功率关系:(4)原副线圈的电流与匝数关系:4多组副线圈的规律2三、电能的输送:1功率损失:2电压损失:3高压输电:【组内检查】1交变电流的定义2正余弦交变电流的产生

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