第18章静電気Static Electricity原書 p.567–622

Key Equations重要な式

18.2 Coulomb's law18.2 クーロンの法則

Coulomb’s law

F = \frac{k q_{1} q_{2}}{r^{2}}

electric field

\vec{E} = \frac{\vec{F}}{q_{test}}

electric field

電場

magnitude of electric field of point charge

点電荷の電場の大きさ

magnitude of electric field of point charge

E = \frac{k | Q |}{r^{2}}

change in electric potential energy for a charge that moves in a constant electric field

一定の電場の中を動く電荷の電気的な位置エネルギーの変化

change in electric potential energy for a charge that moves in a constant electric field

Δ U_{E} = - q E (x_{f} - x_{i})

electric potential energy of a charge a distance r from a point charge or sphere of uniform charge

点電荷または一様に帯電した球から距離rの電荷の電気的な位置エネルギー

electric potential energy of a charge a distance r from a point charge or sphere of uniform charge

U_{E} = \frac{k Q q}{r}

definition of electric potential

V = \frac{U_{E}}{q}

change in electric potential for a charge that moves in a constant electric field

Δ V = - E (x_{f} - x_{i})

electric potential of a charge a distance r from a point charge or sphere of uniform charge

V = \frac{k Q}{r}

capacitance

C = \frac{Q}{V}

energy stored in a capacitor

U_{E} = \frac{1}{2} C V^{2}

capacitance of a parallel-plate capacitor

C = κ ε_{0} \frac{A}{d}