How to use the electric field of a line charge calculator
Find the electric field a distance from a long, uniformly charged line. Enter linear charge density, distance from line in the fields above; the electric field is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “field from charged wire”, “line charge field”, “electric field of rod”, “calculate electric field of a line charge”, “find electric field”.
Formula
Variables
- lam — Linear charge density (µC/m)
- r — Distance from line (m)
Worked example
With linear charge density = 1 µC/m, distance from line = 0.1 m, the calculator gives electric field ≈ 179.751 kV/m.
Frequently asked questions
What is the electric field of a line charge calculator used for?
Find the electric field a distance from a long, uniformly charged line. It helps with questions such as “field from charged wire”, “line charge field”, “electric field of rod”.
What is the formula for the electric field of a line charge calculation?
Electric field (kV/m) = 2 × KE × lam × 1e-6 / r / 1000. Here lam is linear charge density (µC/m), r is distance from line (m).
What inputs do I need for the electric field of a line charge calculator?
You need linear charge density in µC/m, distance from line in m. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the electric field of a line charge calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the electric field of a line charge result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.