question_answer

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)  \[\frac{{{E}^{2}}{{q}^{2}}{{t}^{2}}}{2m}\]         

B)  \[\frac{2{{E}^{2}}{{t}^{2}}}{mq}\]

C)  \[\frac{Eqm}{2t}\]        

D) \[\frac{2{{q}^{2}}m}{2{{t}^{2}}}\]