Fundamental Physics/Electromagnetism/Electric charge

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Electric charge[edit | edit source]

Electric charge Charge process Charge quantity Electric field Magnetic field
Negative charge O + e -> - - Q -->E<-- B ↓
Positive charge O - e -> + + Q <--E--> B ↑

Electric charge interaction[edit | edit source]

Coulomb law[edit | edit source]

Like charges repel, different charges attract . Negative charge attracts positive charge . The force of attraction negative charge attracts positive charge is called Electrostatic force can be calculated by Coulomb law as follow

Ampere law[edit | edit source]

The force that sets electric charge in motion from stationary state is called Electromotive force can be calculated by Ampere law as follow

Lorentz law[edit | edit source]

When electric charge interacts with magnetic field of a magnet, the magnetic force of the magnet will make electric charge to move perpendicular to the initial moving direction . The positive charge will move up, the negative charge will move down . The force of magnetic field that sets electric charge to move perpendicular to the intial moving direction is called Electromagnetomotive force can be calculated as follow

The sum of 2 forces Electromotive force and Electromagnetomotive force creates Electromagnetic force

Electric charge interaction force[edit | edit source]

Electrostatic force
Electromotive force
Electromagnetomotive force
Electromagnetic force

Application[edit | edit source]

The force of attraction of 2 different charges


The electric field of the charge in motion

The potential of the electric field