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1、考 考 你1、电压表的作用是 。2、电压表有 个接线柱，经组合后可有 个量程，分别 为 和 ，接3时的分度值是 。3、电压表要 联在待测电路的两端，而且要让电流从 流 入。4、说出A、B、C中用电压表测灯泡电压不恰当的地方。5、指出甲、乙电压表的测量示数产生的原因，并说出纠正的方 法。+315A+3154.5VBC甲乙Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Clie
2、nt Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-
3、2011 Aspose Pty Ltd.提出问题猜想与假设设计实验进行实验分析归纳得出结论探究环节探究环节组内和大组交流Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.串联电路中各个部分电
4、路的电压与总 电压 有什么关系？ 提出问题 Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.猜想或假设： 串联电路中的总电压可能等于各部分 电路 的电压之和。Evaluation only
5、.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.设计实验： 分别把电压表连在如图所示的电路中AB两 点、BC两点、AC两点，测量电压，看看它们 之间有什么关系。换上另外两个小灯泡，再次 测量，看看是否还有同样的关系。E
6、valuation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.设计实验： 测量AB两点间电压的电路图： Evaluation only.Evaluation only. Created with Aspo
7、se.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.设计实验： 测量BC两点间电压的电路图： Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Cre
8、ated with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.设计实验： 测量AC两点间电压的电路图： Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profi
9、le 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.实验过程： Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-20
10、11 Aspose Pty Ltd.实验数据： Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.串联电路的电压规律串联电路两端的总电压 等于各部分电路两端 电压之和即U总=U1 +U2UA
11、C=UAB +UBCEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.探究并联电路的电压规律并联电路两端的总电压与各支路两端的 电压的关系?干路支路支路Evaluation only.Eva
12、luation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.探究并联电路的电压规律Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Clien
13、t Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.测第一条支路两端的电压的电路图+-VEvaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NE
14、T 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.+-V测第二条支路两端的电压的电路图Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 As
15、pose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.探究并联电路的电压规律实验结果记录表：L1两端的电 压U1/VL2两端的电 压U2/V总电压U/V第一次测量第二次测量Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Lt
16、d.Copyright 2004-2011 Aspose Pty Ltd.探究并联电路的电压规律并联电路两端的总电压 与各支路两端电压相等即U总=U1 =U2Evaluation only.Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0.Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd.Copyright 2004-2011 Aspose Pty Ltd.评估、交流： 实验设计有没有不合理的地方？操作中有没有失误？测量数据和所得的结论是不是可靠？把你的探究过程及结论告诉同学和老师， 征求他们的意见。既要改正自己的错误、弥补 不足，又要为自己的正确观点和做法辩
