Question
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?
At what angle will the electron be traveling after it passes between the plates?
Answers
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.
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.