- #1
CARL0001
Homework Statement
This is the question: An electron at rest of mass 9.11 × 10−31 kg is accelerated through a potential difference of 350 V. It then enters some deflecting plates of 50 V with dimensions as shown. Calculate the distance x (deflection of the electron) (Charge on an electron is 1.6 × 10−19 C)
Given Diagram: https://gyazo.com/73ada230623b2ba00a80f5be8001fade
Homework Equations
W = FEΔd = ½mv2 = qΔV , Δt = Δd / v
https://gyazo.com/0b2211e627a646ec5437e72c0848e6d9
The Attempt at a Solution
So the question is asking to find the displacement in the y direction which is x on the diagram. i first found the original velocity between the vertical plates. in order to get the original velocity i used the following equation qΔV= ½mv2. i rearranged the formula and solved for v which i got to be 1.1 x 10^7 m/s. from my understanding this is the initial velocity of the electron when it enters the horizontal plates. I'm confused where to go from here. i can't find any practice examples similar to this type of question. I'm confused whether or not you need to split this section into vertical and horizontal components. i think next i have to find the electric force and then use that to find the acceleration. then i think you can use
Δt = Δd / v to find the time between the plates. after this i think you can find the displacement using one of the 5 kinematic equations. however I'm confused since i don't know if you need to split this up into different components.