- #1

- 476

- 30

- Homework Statement
- Plates have length 50cm, spacing 1cm, and P.D of 20V. Find minimum velocity of electron such that it just emerge from plates.

- Relevant Equations
- ##F_{e}=qe##

##E=\frac{\triangle V}{\triangle d}##

F=ma

So I can understand how to find out velocity of electron moving between these 2 plates, by using:

##a=\frac{F}{m} =\frac{qE}{m}##

##v^2=2as = \frac{2q}{m}Ex##

##v = \sqrt{\frac{2q}{m}Ex}##

where x = 0.01 , E =20 etc. Answer seems to be way too off, which is expected.