A positively charged particle P enters the region between two parallel plates with a velocity u, in a direction parallel to the plates. There is a uniform electric field in this region. P emerges from this region with a velocity v. Taking C as a constant, v will depend on u as
A. `v=alphau`
B. `v=sqrt(u^(2)+alphau)`
C. `v=sqrt(u^(2)+(alpha)/(u))`
D. `v=sqrt(u^(2)+(alpha)/(u^(2))`
