Second, the electric field strength

Third, the principle of field strength superposition

Point charge field strength

Field strength of point charge system

Field strength of continuous charged body

4. Gauss theorem of electrostatic field

Verb (abbreviation of verb) Electric field intensity of several typical charge distributions

Uniformly charged sphere

Uniformly charged sphere

A long straight cylindrical surface with uniform charge

A long straight cylinder with uniform charge

Infinitely uniform charged plane

Sixth, the circulation theorem of electrostatic field

VII. Potential

Eight, the principle of potential superposition

Point charge potential

Point charge system potential

Continuous charged body potential

Nine, the potential of several typical electric fields

Uniformly charged sphere

Uniformly charged straight line

Ten, conductor electrostatic balance conditions

The electric field intensity in (1) conductor is zero; The field strength near the conductor surface is perpendicular to the surface.

(2) The conductor is an equipotential body and its surface is an equipotential surface.

It is inferred that the charge is only distributed on the surface of the conductor.

The relationship between the field strength near the surface of two conductors and the surface charge density is deduced.

XI。 static screen

The conductor cavity can shield the interaction between internal and external charges in the cavity. That is to say, the electric field outside the cavity (including the outer surface) is zero in the cavity, and the electric field outside the cavity (including the inner surface) is zero.

Twelve. Capacitance of capacitor

parallel plate condenser

Cylindrical capacitor

spherical capacitor

Isolated conductor ball

Thirteen. Connection of capacitor

parallel capacitor

series capacitor

Fourteen Electric field energy

Capacitor energy

field energy density

Electric field energy