The trajectory of an electron, moving initially at speed $v$, in the uniform electric field between two parallel plates is illustrated. The vertical deflection $x$ is taken at the right-hand edge of the plates. The separation between the plates is reduced by half. The potential difference across the plates stays unchanged. What is the new deflection of the electron if it still starts with the same speed $v$?
- A$x$
- B$\sqrt{2}x$
- C$2x$
- D$4x$