A charged particle is projected perpendicular to a uniform electric field of length 2m and initial velocity of charged particle is 10m/s. Calculate deflection of the charge in the direction of electric field., when it leaves it.
A
4mm
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B
6mm
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C
8mm
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D
9mm
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Solution
The correct option is A4mm Time taken to cross electric field region t=dv=210=0.2sec
Acceleration of particle in direction of E.F a=qEm=2×10−5×10010−2=0.2m/s2
Using y=ut+12at2 y=0+12×0.2×(0.2)2 y=4×10−3 y=4mm is the defelection in the direction of E.F