题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125349-63715.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125349-16374.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125350-10362.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125350-73070.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125350-89115.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125351-50391.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125351-14859.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125351-50391.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125351-23846.jpg)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125351-12803.gif)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125352-94880.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125352-40302.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125352-41460.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125352-46259.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125353-58424.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125353-30256.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125353-55713.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125354-78184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125354-13952.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125354-16912.gif)
当磁感应强度最小为
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125355-45647.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125355-67842.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125355-77820.gif)
联立
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125353-30256.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125354-78184.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125354-16912.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125355-77820.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125355-45988.gif)
如图1-3所示,当
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125352-94880.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125356-23684.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125356-52697.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125356-50969.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125353-55713.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125357-78400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125354-13952.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125357-97848.gif)
当磁感应强度最大为
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125357-37442.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125355-67842.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125357-41410.gif)
联立
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125356-50969.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125357-78400.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125357-97848.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125357-41410.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125358-77127.gif)
所施加的磁感应强度为:
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125351-12803.gif)
核心考点
试题【如图1-1所示,两根平行放置的金属导轨,间距为,倾角为,导轨间有电动势、内阻不计的电源。现将一质量为、电阻为的铜棒与轨道垂直放于导轨上,导轨与铜棒间的动摩擦因数】;主要考察你对磁现象和磁场等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125343-81039.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125343-15636.gif)
(1)若中空区域中的带电粒子沿环的半径方向射入磁场,求带电粒子不能穿越磁场外边界的最大速度v0.
(2)若中空区域中的带电粒子以(1)中的最大速度v0沿圆环半径方向射入磁场,求带电粒子从进入磁场开始到第一次回到该点所需要的时间t。
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125344-53614.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125337-24719.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125337-79689.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125337-89573.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125338-31507.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125337-79689.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125337-89573.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125338-32302.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125338-30190.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125338-40317.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125338-26978.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125339-58324.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125339-73740.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125337-24719.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125338-26978.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125339-58324.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125339-33886.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125328-12817.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125329-58056.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125329-60479.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125329-42807.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125329-71263.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125330-11786.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125330-64793.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125330-28312.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125330-22305.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20200114/20200114125318-37893.jpg)
A.让第一束粒子流垂直电场方向进入匀强电场后穿出 |
B.让第一束粒子流垂直磁场方向进入匀强磁场后穿出 |
C.让第二束粒子流垂直电场方向进入匀强电场后穿出 |
D.让第二束粒子流垂直磁场方向进入匀强磁场后穿出 |
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