两个带相同电荷量、同种电荷的带电粒子,质量不同,同时以大小为

两个带相同电荷量、同种电荷的带电粒子,质量不同,同时以大小为v0而方向相反的速度垂直场强方向进入场强为E的同一足够大的匀强电场中,如图所示,不计重力,而且它们在场内也不会相碰.在粒子射入电场经时间Δt后,下面说法正确的(  )

A.速度有可能相同                               B.动量有可能相同

C.动量变化相同                                D.动能变化相同

 

答案

CD

解析:略

 

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