JEE Advanced 2013 Paper 1

A particle of mass M and positive charge Q, moving with a constant velocity

→

u1

=4

^

i

‌ms−1, enters a region of uniform static magnetic field normal to the x-y plane. The region of the magnetic field extends from x = 0 to x = L for all values of y. After passing through this region, the particle emerges on the other side after 10 milliseconds with a velocity

→

u2

=2(√3

^

i

‌+

^

j

)‌ms−1.The correct statement(s) is (are):