A charged particle of mass m and charge q is released from rest in an electric field of constant magnitude E. The kinetic energy of the particle after time t is
| A. |
`(E^2q^2t^2)/(2m)` |
 |
| B. |
`(2E^2t^2)/(qm)` |
| C. |
`(Eqm)/(2t)` |
| D. |
`(Eq^2m)/(2t^2)` |