Fundamental Physics/Electromagnetism/Electric charge
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]
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