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ChrisCrary
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Homework Statement
Picture of problem is attached
A rod of length L lies along the positive y-axis from 0<=y<=L, with L = 0.400 m. It has a positive nonuniform linear charge density (charge per unit length) λ = cy2, where c is a positive constant and has a numerical value of 8.00 x 10-7. (a) What is the unit of c in terms of meter, Coulomb?
(b) find the electric potential V due to the rod at point A on the y-axis at h = 0.450 m from the origin of the xy plane;
(c) find the electric potential V due to the rod at point B on the x-axis at d = 0.650 m from the origin of the xy plane;
(d) How much work (in Joules) is required to bring another charge q0 = + 3.50 μC from point A to point B? The Coulomb constant ke = 1/(4πξ0) = 9.00 x 109 N m2/C2, and 1 μC = 10-6 C.
https://www.physicsforums.com/attachments/imageuploadedbyphysics-forums1426823696-134464-jpg.80675/
Homework Equations
The electric potential due to a single charged particle at a distance r from that particle is V = kq/r, where k is the Coulomb constant.
λ = q / L, or λ = dq / dy
The Attempt at a Solution
My attempt at a solution can be shown in the pictures attached below. I think I got part A and B correct, but please check me as I'm not too sure and I do not have the answers. I worked a bit on part C but got stuck on the integral... I'd rather not do by Trig Substitution. Also, if anyone could manage to explain Part D somewhat, it would be much appreciated. Please tell me if I made any mistakes anywhere!
https://www.physicsforums.com/attachments/imageuploadedbyphysics-forums1426823726-394990-jpg.80676/
https://www.physicsforums.com/attachments/imageuploadedbyphysics-forums1426823751-741658-jpg.80677/
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