Two insulting plates are both uniformly charged in such a way that the potential difference between them is `V_2-V_1=20V`. (i.e., plate 2 is at a higher potential). The plates are separated by `d=0.1m` and can be treated as infinity large. An electron is released from rest on the inner surface of plate 1. What is its speed when it hits plate 2? (`e=1.6xx10^-19C`, `m_e=9.11xx10^-31kg`)

Options

A. `2. 65 xx 10^(6) ms^(-1)`
B. `7. 02 xx 10^(12) ms^(-1)`
C. `1.87 xx 10^(6) ms^(-1)`
D. `32 xx 10^(-19) ms^(-1)`

Answer

A