§8-2 Electric field静电场电场强度 1. Electric field电场 Two viewpoints(观点) about the interaction between charges in the history of physics (1)超距作用 which has been proved to be wrong; ■■■■■■■■■■■■■■■口■■■■■口口■■■■■ interaction
1. Electric Field 电场 Two viewpoints（观点） about the interaction between charges in the history of Physics: (1) 超距作用 which has been proved to be wrong; interaction §8－2 Electric Field 静电场 电场强度
(2) The field viewpoint which consider the charges interact each other by the Field() ■口日日日■ ■■■■ field t:o q The field viewpoint is the great improvement of Physics and a revolutionary viewpoint
(2) The field viewpoint which consider the charges interact each other by the Field(场） The field viewpoint is the great improvement of Physics and a revolutionary viewpoint. q field Q
电场的基本性质: 1)对放在电场内的任何电荷都有作用力; 2)电场力对移动电荷作功。 orce qL work move
电场的基本性质: 1) 对放在电场内的任何电荷都有作用力； 2) 电场力对移动电荷作功。 Electric field q force q work move
2 Electric field电场强度(E) 电场强度:是描述电场中 各点电场强弱的物理量. lo E Test charge: o 电场 (1)电量小;(2)线度小; E(x, y,z)
电场 E( x, y,z ) 电场强度: 是描述电场中 各点电场强弱的物理量. 2.Electric Field电场强度( ) E Test charge: 0 q (1)电量小；（2）线度小； F 0 q E
The electric field E is defined as F qo F lo E 其数值和大小与单位正电荷 电场 在P点所受场力相同。 E(x,y,z)
The electric field is defined as E 其数值和大小与单位正电荷 在 P 点所受场力相同。 q0 F E = 电场 E( x, y,z ) F 0 q E