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In the figure shown a charge q moving w...

In the figure shown a charge `q` moving with a velocity v along the x-axis enter into a region of uniform magnetic field. The minimum value `v` so that the charge `q` is able to enter the region `xgtb`

A

`( q b B)/( m)`

B

`( q ( b-a)B)/( m ) `

C

`( qaB)/( m ) `

D

`( q( b+a)B)/(2m)`

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