Chapter 21 potential 第八章静电场 21-1&21-8 Electric Potential and Potential Difference(p503-505, p515) To study the electric field from the w, we introduce v(electric potential). 1. Features of electrostatic force Coulomb's aw for 1 g,g F electrostatic force 2 Newton 's law for nmin gravitational force: F=G Mathematically identical! Many properties for the gravitational may also be true for electrostatic forcesChapter 21 potential 第八章静电场 To study the electric field from the W, we introduce V (electric potential). 21-1&21-8 Electric Potential and Potential Difference (p503-505, p515) 1. Features of Electrostatic Force Coulomb’s Law for electrostatic force: 2 1 2 4 0 1 r q q F   Newton’s Law for gravitational force: 2 1 2 r m m F  G Mathematically identical! Many properties for the gravitational may also be true for electrostatic forces