2022年人教版高中物理选修1.6《电势差与电场强度》word教案 .pdf

名师精编优秀教案1.6 电势差与电场强度的关系一【教材分析】本节内容主要是研究电势差与电场强度之间的关系，虽然前者是标量，后者是矢量，但通过静电力做功在两者之间建立了联系。本节内容的重点是匀强电场中两点间的电势差等于电场强度与这两点沿电场方向的距离的乘积。二【教学目标】1、知识与技能定性把握电势差与电场强度的关系，理解匀强电场中电势差与电场强度的定量关系。2、过程与方法通过对匀强电场中电势差和电场强度的定性、定量关系的学习，培养学生的分析、解决问题的能力3、情感态度与价值观从不同角度认识电场、分析寻找物理量之间的内在联系，培养对物理学科的兴趣、坚定思考探索物理的的信念，领略物理方法的奥妙，体会物理科学的力量。三【重点、难点】重点：匀强电场中电势差与电场强度的关系难点：对公式 U=E d 中 d 的理解及公式的正确运用(d为沿场强方向两点所在等势面的距离)四【学情分析】电场强度和电势都是描述电场性质的物理量，两者从不同的角度对电场性质进行描述。对于这节课的讲解，只要求让学生定性了解电势差与电场强度的关系就可以了。对于匀强电场，在讲授时，只要求学生了解它们的定量关系式，即在匀强电场中推导出电场强度与电势差的关系公式，并通过公式变形，用比值的方法指出电场强度在数值上等于沿电场方向每单位距离上降低的电势。通过分析，培养学生的分析能力。五【教学方法】讲授法、推理法、归纳法六【课前准备】多媒体辅助教学设备、练习资料七【课时安排】一课时八教学过程（一）预习检查、总结疑惑问题：名师精编优秀教案电场的两个基本性质是什么？答：电场的两个基本性质：电场的力的性质（）（二）情景引入、展示目标电场的能的性质（电势能、电势、电势差）电势电场强度E？电势差（）电场力（）电势能的变化等于电场力所做的功（）电场强度描述电场的力的性质，而电势描述电场的能的性质，且电势差跟电场力做功相联系，那么电场强度E和电势差U又有什么关系呢？倾听、思考、回答培养学生的思维能力、【新课教学】：一、电场强度与电势差的关系通过匀强电场的例子来推算U和 E之间的关系。如图所示：表示某一匀强电场的等势面和电场线。沿场强方向把正电荷q 由 A 点移动到B点，设 A、B两点间的距离为d，电势差为U，场强为E。问题：电场力所做的功是多少？分析：由功的定义和电场强度的定义可知：文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3名师精编优秀教案W=Fd=qEd 由电势差定义可知综合上式得到U=Ed（三）合作探究、精讲点播结论：匀强电场中两点之间的电势差等于电场强度与这两点沿电场方向的距离的乘积。1、表达式：U=Ed U为两点间电压，E为场强，d 为两点间距离在场强方向的投影2、适用条件：匀强电场3、公式变形：在匀强电场中，场强在数值上等于沿场强方向每单位距离上的电势差。但此公式不是U=Ed简单的变形，它的物理意义是：电场强度的大小等于两点间的电势差与这两点间沿电场方向的距离的比值。这一比值在非匀强电场中也适用，它表示两点间的平均电场强度。思考、分析、推导、回答培养学生的思维能力、分析解决问题的能力二、电场强度三个公式的区别公式含义适用条件电场强度的定义式任意电场是真空中点电荷电场的场强计算公式真空中点电荷电场文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 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ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3名师精编优秀教案是匀强电场的场强的计算公式（d 为沿场强方向的距离）匀强电场倾听、回答巩固知识点，培养总结归纳的能力（四）反思总结1、在匀强电场中，电势差和电场强度的关系为：UAB=E d 或 E=UABd 注意：（d 为沿场强方向上的距离）2、电场强度三个公式的区别发学案布置作业作业P23-1、2 ；P24-3、4；资料九【板书设计】第六节电势差与电场强度的关系电势电场强度E？电势差（）电场力（）电势能的变化等于电场力所做的功（）电势电场强度E？电势差（）文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3名师精编优秀教案电场力（）电势能的变化等于电场力所做的功（）电势电场强度E？电势差（）电场力（）电势能的变化等于电场力所做的功（）电势电场强度E？电势差（）电场力（）电势能的变化等于电场力所做的功（）电势电场强度E？电势差（）电场力（）电势能的变化等于电场力所做的功（）一、电场强度与电势差的关系文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 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ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3名师精编优秀教案1、表达式：U=Ed U为两点间电压，E为场强，d 为两点间距离在场强方向的投影2、适用条件：匀强电场3、公式变形：二、电场强度三个公式的区别十【教学反思】讨论电势差和电场强度方向的关系时，为了便于学生接受，可以以生活实例让学生加强理解；在介绍平行板电容器实验装置时，应讲清静电计张角的大小为什么能够表示电容器两极板之间的电压大小；关于恒定电场，学生知道这些就足够了，不必分析导体内电荷分布的具体情况，也不必分析电荷分布达到平衡的过程。文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 ZO2F7W6M3H3文档编码:CS9T3N4W8P7 HH1U4R2N1R1 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