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A charged particle goes undeflected in ...

A charged particle goes undeflected in a region containing uniform electric and magnetic field.It is not possible at all `(vecupsilon="velocity of particle", vecE="uniform electric field", vecB="uniform magnetic field")`

A

`vecE||vecB,vecupsilon||vecE`

B

`vecE` is not collinear to `vecB`

C

`vecupsilon||vecB`but `vecE` is not collinear to `vecB`

D

`vecE||vecB`but `vecupsilon` is not collinear to `vecE`

Text Solution

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The correct Answer is:
C,D
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