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Questions  

An electron moving with a speed u along the positive x-axis at y = 0 enters a region of uniform magnetic field which exists to the right of y-axis. The electron exits from the region after some time with the speed v at coordinate y, then

a
v>u, y<0
b
v=u, y>0
c
v>u, y>0
d
v=u, y<0

detailed solution

Correct option is D

y will be less than zero. Speed will remain same. The trajectory will be as shown in figure

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