Two insulating plates are both uniformly charged in such a way that the potential difference between them is $V_2 - V_1 = 20\ V$ (i.e.,plate $2$ is at a higher potential). The plates are separated by $d = 0.1\ m$ and can be treated as infinitely large. An electron is released from rest on the inner surface of plate $1$. What is its speed when it hits plate $2$? $(e = 1.6 \times 10^{-19}\ C, m_e = 9.11 \times 10^{-31}\ kg)$

• A
  $32 \times 10^{-19} \ m/s$
• B
  $2.65 \times 10^6 \ m/s$
• C
  $7.02 \times 10^{12} \ m/s$
• D
  $1.87 \times 10^6 \ m/s$