Chapter 19 Electric Charge and Electric Field New Words and expressions static charge 静电荷 quantized 量子化的 elementary charge 基本电荷 conductor 导体 insulator 绝缘体 induce 感应 Coulomb 库仑 pe oint charge 点电荷 permittivity of free space 真空电容率 electric field 静电场 test charge 试验电荷 electric dipole 电偶极子Chapter 19 Electric Charge and Electric Field New Words and Expressions static charge 静电荷 quantized 量子化的 elementary charge 基本电荷 conductor 导体 insulator 绝缘体 induce 感应 Coulomb 库仑 point charge 点电荷 permittivity of free space 真空电容率 electric field 静电场 test charge 试验电荷 electric dipole 电偶极子