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Question:

The region between y=0 and y=d contains a magnetic field B = Bx. A particle of mass m and charge q enters the region with a velocity v = vx. If d=mv/(2qB), the acceleration of the charged particle at the point of its emergence at the other side is?

qvB/m(i^+j^2)

qvB/m(1/2i^+j^)

qvB/m(-j^+i^2)

None of these

Solution:

Correct option is D. None of these