A particle of mass m and charge q is released from rest in a uniform electric field. If there is no other force on the particle, the dependence of…

A particle of mass $\displaystyle m$ and charge $\displaystyle q$ is released from rest in a uniform electric field. If there is no other force on the particle, the dependence of its speed $\displaystyle v$ on the distance $\displaystyle x$ travelled by it is correctly given by (graphs are schematic and not drawn to scale)