2. Electrostatic induction( E M) and electrostatic equilibrium(静电平衡) 1). Electrostatic induction
2.Electrostatic induction( 感 应 ） and electrostatic equilibrium（静电平衡） 1）. Electrostatic induction e e e e e e e e e e e e e e e e
导体置于电场中, 其上的电荷重新分布 的现象,称为静电感 应
导体置于电场中， 其上的电荷重新分布 的现象，称为静电感 应
2). Electrostatic equilibrium(静电平衡) When the charges in the conductor are at rest and the field never changes, the conductor is in the electrostatic equilibrium e eNo charge moves!
2）. Electrostatic equilibrium（静电平衡） When the charges in the conductor are at rest and the field never changes, the conductor is in the electrostatic equilibrium. e e e e e e e e No charge moves!
The conditions of electrostatic equilibrium of conductor. E E=0 E (1)E=0 everywhere in the conductor; (2) El the surface of conductor outside the conductor
The conditions of electrostatic equilibrium of conductor: (2) E⊥ the surface of conductor outside the conductor. (1) everywhere in the conductor; E = 0 e e e e e e e e E E E = 0
a deduction(推论): The conductor is an equipotential body and its surface is an equipotential surface U=C
A deduction(推论）: The conductor is an equipotential body and its surface is an equipotential surface. e e e e e e e e U = C