高考七大与高频考点例析.ppt

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高考七大与高频考点例析.ppt

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高考七大与高频考点例析

Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 图23 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 图24 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 20．(2011·江苏高考)图25甲为一理想变压器，ab为原线圈， ce为副线圈，d为副线圈引出的一个接头，原线圈输入正弦式交变电压的u－t图象如图乙所示。若只在ce 间接一只Rce＝400 Ω的电阻，或只在de间接一只Rde＝ 225 Ω的电阻，两种情况下电阻消耗的功率均为80 W。图25 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 图11 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. [针对训练] 9．(2011·江苏高考)如图12所示，水平面内有一平行金属导轨，导轨光滑且电阻不计。匀强磁场与导轨平面垂直。阻值为R的导体棒垂直于导轨静止放置，且与导轨接触良好。t＝0时，将开关S由1掷到2。q、i、v和a 分别表示电容器所带的电荷量、棒中的电流、棒的速度和加速度。如图13中的图象正确的是 (　　) 图12 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 图13 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Prof