A particle having charge that of an electron and mass `1.6xx10^(-30)`kg is projected with an initial speed u at the angle `45^(@)` to the horizontal from the lower plate of a parallel-plate capacitor as shown in fig. The plates are sufficiently long and have a separation of 2 cm, find the maximum value of the velocity of he particle so that it does not hit the upper plate. Take the electric field between the plates as `10^(3)Vm^(-1)` directed upward.

Options

A. `2sqrt(2)xx10^(6)//s`
B. `4xx10^(6)m//s`
C. `6xx10^(6)m//s`
D. `3xx10^(6)m//s`

Answer

1

Explanation

Maximum height =`(u^(2)sin^(2)theta)/(2(g+-(EQ)/(m))`