Electric charge and electric force

• Charge comes in two varieties, positive and negative
• Charge is quantized, in units of e, the charge on an electron
• Charge is conserved
• Like charges repel; opposite charges attract
• Coulomb's Law expresses the force between two charged particles as a function of their charge and separation
• Electric forces can be much, much stronger than gravitational ones
• Another way to express the behavior of electric charges is by their interaction with the electric field
• The electric field is created by charges, and is a vector field

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Copyright © Michael Richmond. This work is licensed under a Creative Commons License.