- #1
Haptic9504
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Homework Statement
The thin plastic rod shown in the figure has length L = 18.0 cm and a nonuniform linear charge density λ = cx, where c = 14.5 pC/m2. With V = 0 at infinity, find the electric potential at point P1 on the axis, at distance d = 5.10 cm from one end.
Figure is attached.
Homework Equations
[tex]q= \lambda x \\
\lambda = cx \\
dv = (kdq)/r[/tex]
The Attempt at a Solution
[tex]q= \lambda x \\
dq = \lambda dx \\
dq = cxdx[/tex]
I figured you would just use
[tex]v =kc \int_{0}^{L}[x/(x+d)]dx[/tex]
And plug in L, solving for V, in which I get -0.17V, which is flagged as incorrect.
Am I approaching this correctly or is there something I am missing?