电荷量为q、质量为m的带电粒子,以水平初速度v0沿电场线方向射入

电荷量为q、质量为m的带电粒子,以水平初速度v0沿电场线方向射入电场中,场强的变化如图6所示(从粒子进入时开始计时).则经过nT(n为正整数)后带电粒子的动能为多少?

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