An electron is accelerated horizontally from rest in a television picture tube by a potential difference of 5400V . It then passes between two horizontal plates 6.1cm long and 1.2cm apart that have a potential difference of 250V
At what angle will the electron be traveling after it passes between the plates?
physics - drwls, Tuesday, March 23, 2010 at 10:41am
Use the potential energy e*V to calculate the velocity through the deflection plates. Call it v.
The drift time through the plates is
t = 0.061/v meters
Calculate the lateral acceleration of the electron as it passes througn the plates,
a = e*250/(0.012*m)
Calculate the lateral velocity v' that is acquired while passing through the plates. v' = a t
The angular deflection in radians is the ratio of lateral velocity to v.