Acceleration of an electron in a constant electric field

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Homework Help Overview

The discussion revolves around the acceleration of an electron in a uniform electric field of 4 x 10^4 N/C over a distance of 7 cm. The original poster seeks guidance on determining the speed of the electron after it exits the electric field, starting from rest.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the work-energy theorem as a potential approach and question the force experienced by the electron in the electric field. There are also inquiries about the work done on the electron by the electric field.

Discussion Status

The conversation includes attempts to clarify the relevant equations and concepts, with some participants suggesting the work-energy theorem while others point out potential inaccuracies in the force equation provided by the original poster. There is an ongoing exploration of the problem without a clear consensus on the next steps.

Contextual Notes

Participants note the original poster's uncertainty about how to begin solving the problem and express a desire for guidance rather than direct answers. There is also mention of a missing constant in the force equation, indicating a need for further clarification on the concepts involved.

gc33550
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Homework Statement


An electron, starting from rest, is accelerated by a uniform electric field of 4 104 N/C that extends over a distance of 7 cm. Find the speed of the electron after it leaves the region of uniform electric field.


Homework Equations


F=(q1q2)/r^2
and maybe the Work equation


The Attempt at a Solution


I really have no idea if i could get an idea of how to start it i may be able to think through it. I don't want an answer just a little guidance please
 
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The work-energy theorem is the way to go ...
 
2. Homework Equations
F=(q1q2)/r^2
and maybe the Work equation

Your force equation is incorrect; You are missing a constant
 
gc33550 said:

Homework Statement


An electron, starting from rest, is accelerated by a uniform electric field of 4 104 N/C that extends over a distance of 7 cm. Find the speed of the electron after it leaves the region of uniform electric field.


Homework Equations


F=(q1q2)/r^2
and maybe the Work equation
What is the force experienced by an electron in an electric field?
What is the work done on the electron by the electric field?
 

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