F=14πϵ0×q1q2d2F=\frac{1}{4 \pi \epsilon_{0}} \times \frac{q_{1} q_{2}}{d^{2}}F=4πϵ01×d2q1q2
F=14π∈0K˙×q1q2d2F=\frac{1}{4 \pi \in_{0} \dot{K}} \times \frac{q_{1} q_{2}}{d^{2}}F=4π∈0K˙1×d2q1q2
F=qE\mathrm{F}=\mathrm{qE}F=qE
F=14πϵ0×d2q1q2F=\frac{1}{4 \pi \epsilon_{0}} \times \frac{d^{2}}{q_{1} q_{2}}F=4πϵ01×q1q2d2