Saleem·the Physics Master

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Electric Field Explorer

Probe (drag the ⊕ ring)

|E|– Direction θ– Eₓ , E_y– Potential V– F on q₀ = +1 nC–

θ measured counter-clockwise from +x. Grid squares are 10 cm.

Selected charge

Tap a charge to select it.

Show

Field lines Field vectors (grid) Equipotential lines Potential shading Grid (10 cm)

Lines per µC8

field line equipotential V = 0

Try with students

Two like charges: where is E = 0? Move the probe there — is V also zero?
Dipole: trace the V = 0 line (dark green). Why is E not zero on it?
Why do field lines always cross equipotentials at 90°?
Parallel plates: check |E| at several points between the plates.
Double one charge — how does the line count change?