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The region between y =0 and y=d constai...

The region between y =0 and y=d constains a magnetic field `vecB = Bvecz`. A particle of mass m and charge q enters of the region with a velocity `vecv = v veci`. If `d =(mv)/(2qB)` the acceleration of the charged particle at the point of its emergence at the other side is :

A

`(qvB)/(m) ((1)/(2)hati-(sqrt(3))/(2)hatj)`

B

`(qvB)/(m) ((sqrt(3))/(2)hati-(1)/(2)hatj)`

C

`(qvB)/(m) ((-hatj+hati)/(sqrt(2)))`

D

`(qvB)/(m) ((hati+hatj)/(sqrt(2)))`

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