CBSE Class 11-science Answered
A particle of mass m and charge q is thrown at a speed u in the region of uniform electric field E. The particle's initial velocity is in direction opposite to direction of electric field. Determine the time in which the particle reaches its projection position.
Asked by rishabhkaushik2000 | 30 Dec, 2015, 05:48: PM
Expert Answer
A charged particle moving parallel to the electric field will experience an acceleration if the electric force acting on it is in its direction of travel or a deceleration if the electric force acting on it is in the opposite direction of travel.
The particle's initial velocity in opposite direction of electric field, the charged particle will first undergo deceleration (its speed becomes slower), 
.
.F = q E
F = m a
q E = m a
The particle's initial velocity in opposite direction of electric field, the charged particle will first undergo deceleration
substituting in the kinematic equation gives
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