题目内容
如图所示是一个单摆做受迫振动时的共振曲线,表示振幅A与驱动力的频率f的关系,下列说法正确的是( )
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250053315286213.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250053315286213.png)
A.摆长约为10cm |
B.摆长约为1m |
C.若增大摆长,共振曲线的“峰”将向右移动 |
D.若增大摆长,共振曲线的“峰”将向左移动 |
BD
试题分析:由共振曲线可知:当驱动力频率
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005331544562.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005331544562.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005331575780.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/201408250053315911300.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140825/20140825005331575780.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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题目内容
A.摆长约为10cm |
B.摆长约为1m |
C.若增大摆长,共振曲线的“峰”将向右移动 |
D.若增大摆长,共振曲线的“峰”将向左移动 |