A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
An electron is projected with an initial speed 1.70×106 m/s into the uniform field between two parallel plates that are 1 cm apart. Assume that the field between the plates is uniform and directed vertically downward (positive to negative), and that the field outside the plates is zero. The electron enters the field at a point midway between the plates.
If the electron just misses the upper plate as it emerges from the field, find the speed of the electron as it emerges from the field?
anonymous
 one year ago
An electron is projected with an initial speed 1.70×106 m/s into the uniform field between two parallel plates that are 1 cm apart. Assume that the field between the plates is uniform and directed vertically downward (positive to negative), and that the field outside the plates is zero. The electron enters the field at a point midway between the plates. If the electron just misses the upper plate as it emerges from the field, find the speed of the electron as it emerges from the field?

This Question is Open

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.0the upwards force on the electron will be given by \[F = Eq_e  m_e g\] this will be a constant force as the electric field will be constant inside the parallel plates, so first, you can also say that \[F = m_e \ a\] so that upward acceleration, a, is:\[a =\frac{Eq_e  m_e g}{m_e} = E\frac{q_e}{m_e}  g\] you can also use the equations of motion, i suggest here \[v^2 = u^2 + 2ax\] initial [ie vertical] velocity u = 0, x = 0.5cm, v is what we want, ie the vertical component of velocity, and we also have an expression for a; but note that you have not provided a field strength. for this to be answerable, we need to know either the field strength, or indeed the length of the plates. if we have plate length, the question becomes considerably simpler.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.