Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Introductory Physics Homework Help
Electric Potential Due to point charges
Reply to thread
Message
[QUOTE="MidgetDwarf, post: 5441987, member: 536423"] [h2]Homework Statement [/h2] [LIST=1] [*]Two particles each with a charge of +3.00 μC are located on the x axis, with one particle at x = -0.80 m, and the other particle at x = +0.80 m. [LIST=1] [*]a) Determine the electric potential on the y-axis at the point y = 0.60 m.[*]b) What is the change in electric potential energy of the system if a third particle of charge q = - 3.00 μC is brought from infinity to the point on the y-axis where y = 0.60 m? [/LIST] [/LIST] [h2]Homework Equations[/h2] Vp=KQ/r Vb-Va Pythagoras Theorem [h2]The Attempt at a Solution[/h2] First I draw the diagram. I place one charge at x=-0.80m and the second at x=0.80m. The point at which I want to calculate the potential energy is at (0,0.60m). I apply the Theorem of Pythagoras to get the radial distance from where the point charge is located to the point I want to find potential. r=Sqrt(x^2 +y^2) r=1m Since I have two charges, the Total potential is equal to the sum of both of the charges. Vtotal= V1 +V2. Since Both charges are equal and are the same distance apart to the point p, Vtotal=53940 V. This is my answer for part A. for part B, I want to find the potential difference Vb-Va. A charge comes into point P from infinity, So we say that at infinity it has zero potential. However, at P, the potential is -44950 V. Now, my problem is. Can I use my result from part a to answer part b. Meaning Va=53940 V. Since the charges are not moving from P (the ones that moved from the x-axis). Would my answer be Vb-Va=-44950-53940 Vb-Va=-98,890? Sorry for this beginner problem. I am not sure if I am understanding the concept of Potential due to Point Charges. [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Electric Potential Due to point charges
Back
Top