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# Electric charge and electric field

## 1. ELECTROSTATIC FIELD COULOMB’S LAW ELECTROSTATIC FIELD STRENGTH

UFA STATE PETROLEUM TECHNOLOGICAL
UNIVERSITY
PHYSICS FACULTY
ELECTROSTATIC FIELD
COULOMB’S LAW
ELECTROSTATIC FIELD
STRENGTH
Senior lecturer: Valiakhmetova O.Y.

## 2. ELEMENTARY CHARGE

ТЕКСТ
ELEMENTARY CHARGE
Elementary charge equals to:
e =1,60217662 × 10-12 C

## 3. COULOMB’S LAW

ТЕКСТ
COULOMB’S LAW
Where:
q1 and q2 are charges of point-like particles
F - is a force of electric interaction between these two particles
r - is a distance between these two particles
ε0 -is a vacuum permittivity and ε0 = 8,85418781762
· 10−12 C2/N.m2

## 4. DENSITIES’ FORMULAS

ТЕКСТ
DENSITIES’ FORMULAS
▸ A linear charge density
[C/m]
▸ A volume charge density
[C/m3]
▸ A surface charge density
[C/m2]

## 5. ELECTRIC FIELD

ТЕКСТ
ELECTRIC FIELD
▸ An intensity of the electric field
▸ A single charge’s intensity
[V/m]
▸ The Principle of superposition
[V/m]

## 6. GAUSS’ LAW

ТЕКСТ
GAUSS’ LAW
Where:
Ф - electric flux [Nm2/C]
E - field strength
q - electric charge

## 7. USAGE OF GAUSS’ THEOREM

ТЕКСТ
USAGE OF GAUSS’ THEOREM
▸ A field strength of an infinite-uniformly charged plane
▸ A field strength of the two charged infinite-parallel planes
(capacitor)

## 8. USAGE OF GAUSS’ THEOREM

ТЕКСТ
USAGE OF GAUSS’ THEOREM
▸ A field strength of an infinitely-long charged filament
▸ A field strength of a sphere
▸ If r<R, then
▸ If r=R, then
▸ If r>R
E=0