What is the differences of electrostatic and electromagnetic force?
Electrostatic force is the force between static (not moving relative to each other) electric charges. Electromagnetic forces are any interactions due to photon exchange and INCLUDES electrostatic forces.
The Electrostatic Force between two objects is given by Coulomb's Law
The Electromagnetic Forces are a set of forces, including Electrostatic Forces, and the forces caused by charges moving near each other. Moving charges cause magnetic fields and experience force from each other as a result.
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