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MyAmpsGoTo11
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Homework Statement
A uniform line charge of linear charge density 5 nC/m extends from x = 0 m to x = 4 m. Find the electric field at x = 7 m. Answer in units of N/C.
Homework Equations
8.85 × 10^−12 C2/(N · m^2) is the permittivity constant
8.98755 ×10^9 (N · m^2)/C^2 is Coulomb's constant
Gauss's Law surface integral of E da = Q/(permittivity constant)
The Attempt at a Solution
I know the field of of a point on the SIDE of the same line segment is
kQ
(r square root of (r^2 +(L/2)^2))
Where r is the distance from the rod, and L the length of the rod, but my attempts are wrong.
I do not know how to find the field of a rod on the same axis.