Physics 3 — Electricity & Magnetism

The field — force per unit charge

continues from lesson 1 — values defined earlier in the course stay live here

Instead of asking "what force on THIS charge", map what any charge would feel: E = k·q/r², in newtons per coulomb. The field exists whether or not anything is there to feel it:

E_{1} = \frac{k_{e} \cdot q_{1}}{r_{q}^{2}}

1.7976 \times 10^{6}

field of q₁ at 10 cm (N/C)

8.988e9 * 2e-6 / x^2

field strength vs distance (m) — the inverse-square cliff