An electron and a proton are allowed to fall through the separation the plates of a parallel plate capacitor of voltage 5 V and separation distance h = 1 mm as shown in the figure .

(a) Calculate the time of flight for both electron and proton
(b) Suppose if a neutron is allowed to fall what is the time of flight ?
(c ) Among the three which one will reach the bottom first?
( Take `m_(p) = 1.6xx10^(-27)kg , m_(c) = 9.1 xx10^(-31) " kg and g " = 10 ms^(-2))`

Explanation

Electron will reach first
`:.` the time to reach the bottom first by electron is 1.5 ns.