The electron is projected from a distance d and with initial velocity `υ_o` parallel to a uniformly charged flat conducting plate as shown in figure. It strikes the plate after travelling a distance l along the direction. The surface charge density of conducting plate is equal to
Options:
(a) `(2depsilon_o mυ_o)/(el)`
(b) `(depsilon_o mυ_o^2)/(el)`
(c) `(depsilon_o mυ_o)/(el)`
(d) `(2depsilon_o mυ_o^2)/(el^2)`