(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

An electron is accelerated horizontally from rest in a television picture tube by a

potential difference of 25,000 V. It then passes between two horizontal plates 6.5 cm

long and 1.3 cm apart that have a potential difference of 250 V, as shown below. At

what angle θ will the electron be traveling after it passes between the plates?

2. Relevant equations

E=F/Q E=KQ/r^2 F=EQ V=KQ/R E=V/D F=MA

3. The attempt at a solution

I haven't really attempted much, I kind of need a hint to get me started.

I mean, I THINK I know how to solve it but I'm stuck. figure it is accelerated horizontally which would be a force in the X direction, and between the plates it experiences a force in the Y Direction, so you would just do Tan[tex]\alpha[/tex] = Fy/Fx

My Thing is, if this is correct, I have no clue how to GET the force X. I mean, you can find the velocity, idk how I could find acceleration from there for F=MA. Or, you could say Fx=EQ, but then I have no clue how to find an electric field at the beginning.

I'm Also going to try doing the arctan function w/ the velocities, however that will work I shall see. -> Just tried it, I used electron volts to get the P.E which backfired

I don't need it solved for me, I just need a hint or two to get me started.

P.S. Just found this, might help (like on page 6 of google) https://www.physicsforums.com/showthread.php?t=13031. I'll try it

EDIT: Just Re-did the electron volt thing for velocities, and I got .57 degrees. Doesn't seem right but meh, I'll check it tomorrow. If anyone gets any ideas though I'm open to advice :)

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# Homework Help: Trouble w/ electron in a television picture tube. Hints please

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