A uniform electric field exists in a region between two oppositely charged plates. An electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate distance L away in a time Δt. Then the electric field (in terms of m, e, L, Δt) is given by -
1
\(\mathrm{E}=\frac{2 \mathrm{Lm}}{\mathrm{e}(\Delta \mathrm{t})^{2}}\)
2
\( \mathrm{E}=\frac{\mathrm{Lm}}{\mathrm{e}(\Delta \mathrm{t})^{2}}\)
3
\( \mathrm{E}=\frac{\mathrm{Lm}}{2 \mathrm{e}(\Delta \mathrm{t})^{2}}\)
4
\(\mathrm{E}=\frac{\mathrm{Lm}}{\mathrm{e} \Delta \mathrm{t}}\)