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电荷在电场中的加速

> 带电粒子（不计重力）以初速度V 0从a点进入匀强磁场，如图8。运动中经过b点，oa=ob。若撤去磁场加一个与y轴平行的匀强电场，仍以V 0从a点进入电场，粒子仍能通过b点，那么电场强度E与磁感强度B之比E/B为：（） A．V0 B．1 C．2V0 D．

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发布时间：2024-09-11

带电粒子（不计重力）以初速度V ₀从a点进入匀强磁场，如图8。运动中经过b点，oa=ob。若撤去磁场加一个与y轴平行的匀强电场，仍以V ₀从a点进入电场，粒子仍能通过b点，那么电场强度E与磁感强度B之比E/B为：（）

A．V₀ B．1 C．2V₀ D．

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