A charged particle having kinetic energy...

A charged particle having kinetic energy `E` enters normally a region of uniform magnetic field between two plates `P_(1)` and `P_(2)` as shown in the figure. If the particle just misses hitting the plate `P_(2)`, then the magnetic field `B` in the region between the plates is

mk/qa

2mk/qa

`sqrt((mk))//qa`

`sqrt((2mk))//qa`

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B, C, D

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