【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
如图所示,在xoy平面坐标系中,x轴上方存在电场强度E=1000v/m、方向沿y轴负方向的匀强电场;在x轴及与x轴平行的虚线PQ之间存在着磁感应强度为B=2T、方向垂直纸面向里的匀强磁场,磁场宽度为d.一个质量m=2×10-8kg、带电量q=+1.0×10-5C的粒子从y轴上(0,0.04)的位置以某一初速度v0沿x轴正方向射入匀强电场,不计粒子的重力
要使粒子能够经过x轴上100m处,求粒子入射的初速度v0
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACAAAAAgCAYAAABzenr0AAAA5ElEQVRYR2NkGGDAOMD2M+B0wKpVq9huv/jbxPD/fxwDA4MkhQ59zsDIuEhVgrkuLCzsF7JZOB3QOml5B8P//+UUWoyqnZGxszovsoI4B0xc9gyfzxmZmb2rcsK3IRvWMWm599///7fgcfTz6vwoKWId8B+f75kZGX0q8iK3kugAhur8KJRQxx0FE5fhdQC5UTPqgNEQGA2B0RAYDYHREBgNgaETAuTW96TqG7yt4tbRFhGRIQBqHTP9+8dIoDUMTxqk5AK8zXKYiaDWMYhNpANIaJYPdMdkwLtmpOZnctUPeDkAAP6tmiH1ggTLAAAAAElFTkSuQmCC)
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参考答案:
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参考解析:
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