A mass 
has a charge 
. It moves with a velocity of 
and enters a region of electric field of 
in the same direction as the velocity of the mass. The velocity of the mass after 3 s in this region is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
When charged particle enters in a uniform electric field, then force on charged particle, 
F = ma
ma = qE
or acceleration, 
So, from equations of motion
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